diff --git a/backend/code49.c b/backend/code49.c
index 64fe280c..9caa0484 100644
--- a/backend/code49.c
+++ b/backend/code49.c
@@ -329,7 +329,9 @@ int code_49(struct zint_symbol *symbol, unsigned char source[], const int length
     }
 
     symbol->whitespace_width = 10;
-    symbol->output_options += BARCODE_BIND;
+    if (!(symbol->output_options & BARCODE_BIND)) {
+        symbol->output_options += BARCODE_BIND;
+    }
     symbol->border_width = 2;
 
     return 0;
diff --git a/backend/dotcode.c b/backend/dotcode.c
index 0f0b29e0..993506ea 100644
--- a/backend/dotcode.c
+++ b/backend/dotcode.c
@@ -302,7 +302,7 @@ int seventeen_ten(unsigned char source[], int position, int length) {
  *  returning the resulting number of codewords (Annex F.II.E)
  */
 int ahead_c(unsigned char source[], int position, int length) {
-    int count = 0;
+    int count = 0;
 	int i;
 
     for (i = position; (i < length) && datum_c(source, i, length); i += 2) {
@@ -327,7 +327,7 @@ int try_c(unsigned char source[], int position, int length) {
 
 /* Annex F.II.G */
 int ahead_a(unsigned char source[], int position, int length) {
-    int count = 0;
+    int count = 0;
 	int i;
 
     for (i = position; ((i < length) && datum_a(source, i, length))
@@ -340,7 +340,7 @@ int ahead_a(unsigned char source[], int position, int length) {
 
 /* Annex F.II.H */
 int ahead_b(unsigned char source[], int position, int length) {
-    int count = 0;
+    int count = 0;
 	int i;
 
     for (i = position; ((i < length) && datum_b(source, i, length))
@@ -1050,8 +1050,8 @@ int dotcode(struct zint_symbol *symbol, unsigned char source[], int length) {
     unsigned char codeword_array[length * 3];
     unsigned char masked_codeword_array[length * 3];
 #else
-    char* dot_stream;
-    char* dot_array;
+    char* dot_stream;
+    char* dot_array;
     unsigned char* codeword_array = (unsigned char *) _alloca(length * 3 * sizeof (unsigned char));
     unsigned char* masked_codeword_array = (unsigned char *) _alloca(length * 3 * sizeof (unsigned char));
 #endif /* _MSC_VER */
@@ -1249,7 +1249,9 @@ int dotcode(struct zint_symbol *symbol, unsigned char source[], int length) {
         symbol->row_height[k] = 1;
     }
 
-    symbol->output_options += BARCODE_DOTTY_MODE;
+    if (!(symbol->output_options & BARCODE_DOTTY_MODE)) {
+        symbol->output_options += BARCODE_DOTTY_MODE;
+    }
 
     return 0;
 }
\ No newline at end of file
diff --git a/backend/library.c b/backend/library.c
index d912dd50..a5a1826d 100644
--- a/backend/library.c
+++ b/backend/library.c
@@ -570,13 +570,17 @@ static int reduced_charset(struct zint_symbol *symbol, const unsigned char *sour
     if (symbol->symbology == BARCODE_CODE16K) {
         symbol->whitespace_width = 16;
         symbol->border_width = 2;
-        symbol->output_options += BARCODE_BIND;
+        if (!(symbol->output_options & BARCODE_BIND)) {
+            symbol->output_options += BARCODE_BIND;
+        }
     }
 
     if (symbol->symbology == BARCODE_ITF14) {
         symbol->whitespace_width = 20;
         symbol->border_width = 8;
-        symbol->output_options += BARCODE_BOX;
+        if (!(symbol->output_options & BARCODE_BOX)) {
+            symbol->output_options += BARCODE_BOX;
+        }
     }
 
     switch (symbol->input_mode) {
diff --git a/backend/pcx.c b/backend/pcx.c
index c0c71a95..4525f804 100644
--- a/backend/pcx.c
+++ b/backend/pcx.c
@@ -35,10 +35,10 @@
 #include <string.h>
 #include "common.h"
 #include "pcx.h"        /* PCX header structure */
-#include <math.h>
-#ifdef _MSC_VER
-#include <io.h>
-#include <fcntl.h>
+#include <math.h>
+#ifdef _MSC_VER
+#include <io.h>
+#include <fcntl.h>
 #endif
 
 #define SSET	"0123456789ABCDEF"
@@ -49,11 +49,11 @@ int pcx_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width
     int row, column, i, colour;
     int run_count;
     FILE *pcx_file;
-    pcx_header_t header;
-#ifdef _MSC_VER
-	char* rotated_bitmap;
-    unsigned char* rle_row;
-#endif
+    pcx_header_t header;
+#ifdef _MSC_VER
+	char* rotated_bitmap;
+    unsigned char* rle_row;
+#endif
     
 #ifndef _MSC_VER
     char rotated_bitmap[image_height * image_width];
@@ -180,7 +180,7 @@ int pcx_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width
     }
     
     /* Open output file in binary mode */
-    if ((symbol->output_options & BARCODE_STDOUT) != 0) {
+    if (symbol->output_options & BARCODE_STDOUT) {
 #ifdef _MSC_VER
         if (-1 == _setmode(_fileno(stdout), _O_BINARY)) {
             strcpy(symbol->errtxt, "Can't open output file");
diff --git a/backend/png.c b/backend/png.c
index cb08dcd5..3210baf4 100644
--- a/backend/png.c
+++ b/backend/png.c
@@ -131,7 +131,7 @@ int png_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width
     bgblu = (16 * ctoi(symbol->bgcolour[4])) + ctoi(symbol->bgcolour[5]);
 
     /* Open output file in binary mode */
-    if ((symbol->output_options & BARCODE_STDOUT) != 0) {
+    if (symbol->output_options & BARCODE_STDOUT) {
 #ifdef _MSC_VER
         if (-1 == _setmode(_fileno(stdout), _O_BINARY)) {
             strcpy(symbol->errtxt, "Can't open output file");
diff --git a/backend/ps.c b/backend/ps.c
index add5a9bd..5d06a962 100644
--- a/backend/ps.c
+++ b/backend/ps.c
@@ -99,7 +99,7 @@ int ps_plot(struct zint_symbol *symbol) {
         }
     }    
 
-    if ((symbol->output_options & BARCODE_STDOUT) != 0) {
+    if (symbol->output_options & BARCODE_STDOUT) {
         feps = stdout;
     } else {
         feps = fopen(symbol->outfile, "w");
@@ -848,7 +848,7 @@ int ps_plot(struct zint_symbol *symbol) {
             /* Do nothing! (It's already been done) */
             break;
         default:
-            if ((symbol->output_options & BARCODE_BIND) != 0) {
+            if (symbol->output_options & BARCODE_BIND) {
                 if ((symbol->rows > 1) && (is_stackable(symbol->symbology) == 1)) {
                     /* row binding */
                     fprintf(feps, "TE\n");
@@ -862,7 +862,7 @@ int ps_plot(struct zint_symbol *symbol) {
                     }
                 }
             }
-            if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
+            if ((symbol->output_options & BARCODE_BOX) || (symbol->output_options & BARCODE_BIND)) {
                 fprintf(feps, "TE\n");
                 if ((symbol->output_options & CMYK_COLOUR) == 0) {
                     fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
@@ -872,7 +872,7 @@ int ps_plot(struct zint_symbol *symbol) {
                 fprintf(feps, "%.2f %.2f TB %.2f %.2f TR\n", symbol->border_width * scaler, textoffset * scaler, 0.0, (symbol->width + xoffset + xoffset) * scaler);
                 fprintf(feps, "%.2f %.2f TB %.2f %.2f TR\n", symbol->border_width * scaler, (textoffset + symbol->height + symbol->border_width) * scaler, 0.0, (symbol->width + xoffset + xoffset) * scaler);
             }
-            if ((symbol->output_options & BARCODE_BOX) != 0) {
+            if (symbol->output_options & BARCODE_BOX) {
                 /* side bars */
                 fprintf(feps, "TE\n");
                 if ((symbol->output_options & CMYK_COLOUR) == 0) {
diff --git a/backend/raster.c b/backend/raster.c
index d13c1c5a..a5c5719b 100644
--- a/backend/raster.c
+++ b/backend/raster.c
@@ -292,7 +292,7 @@ int plot_raster_maxicode(struct zint_symbol *symbol, int rotate_angle, int data_
     image_height = 300 + (2 * yoffset * 2);
 
     if (!(pixelbuf = (char *) malloc(image_width * image_height))) {
-        printf("Insifficient memory for pixel buffer");
+        printf("Insufficient memory for pixel buffer");
         return ZINT_ERROR_ENCODING_PROBLEM;
     } else {
         for (i = 0; i < (image_width * image_height); i++) {
@@ -319,13 +319,13 @@ int plot_raster_maxicode(struct zint_symbol *symbol, int rotate_angle, int data_
         }
     }
 
-    if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
+    if ((symbol->output_options & BARCODE_BOX) || (symbol->output_options & BARCODE_BIND)) {
         /* boundary bars */
         draw_bar(pixelbuf, 0, image_width, 0, symbol->border_width * 2, image_width, image_height);
         draw_bar(pixelbuf, 0, image_width, 300 + (symbol->border_width * 2), symbol->border_width * 2, image_width, image_height);
     }
 
-    if ((symbol->output_options & BARCODE_BOX) != 0) {
+    if (symbol->output_options & BARCODE_BOX) {
         /* side bars */
         draw_bar(pixelbuf, 0, symbol->border_width * 2, 0, image_height, image_width, image_height);
         draw_bar(pixelbuf, 300 + ((symbol->border_width + symbol->whitespace_width + symbol->whitespace_width) * 2), symbol->border_width * 2, 0, image_height, image_width, image_height);
@@ -619,7 +619,7 @@ int plot_raster_default(struct zint_symbol *symbol, int rotate_angle, int data_t
         }
     }
 
-    if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
+    if ((symbol->output_options & BARCODE_BOX) || (symbol->output_options & BARCODE_BIND)) {
         default_text_posn = image_height - 17;
     } else {
         default_text_posn = image_height - 17 - symbol->border_width - symbol->border_width;
@@ -867,7 +867,7 @@ int plot_raster_default(struct zint_symbol *symbol, int rotate_angle, int data_t
     xoffset -= comp_offset;
 
     /* Put boundary bars or box around symbol */
-    if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
+    if ((symbol->output_options & BARCODE_BOX) || (symbol->output_options & BARCODE_BIND)) {
         /* boundary bars */
         draw_bar(pixelbuf, 0, (symbol->width + xoffset + xoffset) * 2, textoffset * 2, symbol->border_width * 2, image_width, image_height);
         draw_bar(pixelbuf, 0, (symbol->width + xoffset + xoffset) * 2, (textoffset + symbol->height + symbol->border_width) * 2, symbol->border_width * 2, image_width, image_height);
@@ -881,7 +881,7 @@ int plot_raster_default(struct zint_symbol *symbol, int rotate_angle, int data_t
         }
     }
 
-    if ((symbol->output_options & BARCODE_BOX) != 0) {
+    if (symbol->output_options & BARCODE_BOX) {
         /* side bars */
         draw_bar(pixelbuf, 0, symbol->border_width * 2, textoffset * 2, (symbol->height + (2 * symbol->border_width)) * 2, image_width, image_height);
         draw_bar(pixelbuf, (symbol->width + xoffset + xoffset - symbol->border_width) * 2, symbol->border_width * 2, textoffset * 2, (symbol->height + (2 * symbol->border_width)) * 2, image_width, image_height);
@@ -931,7 +931,7 @@ int plot_raster(struct zint_symbol *symbol, int rotate_angle, int file_type) {
     }
 #endif /* NO_PNG */    
 
-    if (symbol->output_options &= BARCODE_DOTTY_MODE) {
+    if (symbol->output_options & BARCODE_DOTTY_MODE) {
         error = plot_raster_dotty(symbol, rotate_angle, file_type);
     } else {
         if (symbol->symbology == BARCODE_MAXICODE) {
diff --git a/backend/render.c b/backend/render.c
index aa5d7de4..92dcbdb3 100644
--- a/backend/render.c
+++ b/backend/render.c
@@ -248,7 +248,7 @@ int render_plot(struct zint_symbol *symbol, const float width, const float heigh
     }
     large_bar_height = (symbol->height - preset_height) / large_bar_count;
 
-    if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
+    if ((symbol->output_options & BARCODE_BOX) || (symbol->output_options & BARCODE_BIND)) {
         default_text_posn = (symbol->height + text_offset + symbol->border_width + symbol->border_width) * scaler;
     } else {
         default_text_posn = (symbol->height + text_offset + symbol->border_width) * scaler;
@@ -643,13 +643,13 @@ int render_plot(struct zint_symbol *symbol, const float width, const float heigh
                     }
                 }
             }
-            if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
+            if ((symbol->output_options & BARCODE_BOX) || (symbol->output_options & BARCODE_BIND)) {
                 line = render_plot_create_line(0, 0, (symbol->width + xoffset + xoffset) * scaler, symbol->border_width * scaler);
                 render_plot_add_line(symbol, line, &last_line);
                 line = render_plot_create_line(0, (symbol->height + symbol->border_width) * scaler, (symbol->width + xoffset + xoffset) * scaler, symbol->border_width * scaler);
                 render_plot_add_line(symbol, line, &last_line);
             }
-            if ((symbol->output_options & BARCODE_BOX) != 0) {
+            if (symbol->output_options & BARCODE_BOX) {
                 /* side bars */
                 line = render_plot_create_line(0, 0, symbol->border_width * scaler, (symbol->height + (2 * symbol->border_width)) * scaler);
                 render_plot_add_line(symbol, line, &last_line);
diff --git a/backend/svg.c b/backend/svg.c
index 0ca80259..64576eb2 100644
--- a/backend/svg.c
+++ b/backend/svg.c
@@ -95,7 +95,7 @@ int svg_plot(struct zint_symbol *symbol) {
         }
     }
 
-    if ((symbol->output_options & BARCODE_STDOUT) != 0) {
+    if (symbol->output_options & BARCODE_STDOUT) {
         fsvg = stdout;
     } else {
         fsvg = fopen(symbol->outfile, "w");
@@ -230,7 +230,7 @@ int svg_plot(struct zint_symbol *symbol) {
         fprintf(fsvg, "      <rect x=\"0\" y=\"0\" width=\"%d\" height=\"%d\" fill=\"#%s\" />\n", (int)ceil((74.0F + xoffset + xoffset) * scaler), (int)ceil((72.0F + yoffset + yoffset) * scaler), symbol->bgcolour);
     }
 
-    if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
+    if ((symbol->output_options & BARCODE_BOX) || (symbol->output_options & BARCODE_BIND)) {
         default_text_posn = (symbol->height + textoffset + symbol->border_width + symbol->border_width) * scaler;
     } else {
         default_text_posn = (symbol->height + textoffset + symbol->border_width) * scaler;
@@ -242,11 +242,11 @@ int svg_plot(struct zint_symbol *symbol) {
 
 
         textoffset = 0.0;
-        if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
+        if ((symbol->output_options & BARCODE_BOX) || (symbol->output_options & BARCODE_BIND)) {
             fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", 0.0, 0.0, (74.0 + xoffset + xoffset) * scaler, symbol->border_width * scaler);
             fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", 0.0, (72.0 + symbol->border_width) * scaler, (74.0 + xoffset + xoffset) * scaler, symbol->border_width * scaler);
         }
-        if ((symbol->output_options & BARCODE_BOX) != 0) {
+        if (symbol->output_options & BARCODE_BOX) {
             /* side bars */
             fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", 0.0, 0.0, symbol->border_width * scaler, (72.0 + (2 * symbol->border_width)) * scaler);
             fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (74.0 + xoffset + xoffset - symbol->border_width) * scaler, 0.0, symbol->border_width * scaler, (72.0 + (2 * symbol->border_width)) * scaler);
@@ -307,7 +307,7 @@ int svg_plot(struct zint_symbol *symbol) {
             }
             row_posn += yoffset;
             
-            if ((symbol->output_options & BARCODE_DOTTY_MODE) != 0) { 
+            if (symbol->output_options & BARCODE_DOTTY_MODE) { 
                 /* Use (currently undocumented) dot mode - see SF ticket #29 */
                 for (i = 0; i < symbol->width; i++) {
                     if (module_is_set(symbol, this_row, i)) {
@@ -609,7 +609,7 @@ int svg_plot(struct zint_symbol *symbol) {
             /* Do nothing! (It's already been done) */
             break;
         default:
-            if ((symbol->output_options & BARCODE_BIND) != 0) {
+            if (symbol->output_options & BARCODE_BIND) {
                 if ((symbol->rows > 1) && (is_stackable(symbol->symbology) == 1)) {
                     /* row binding */
                     for (r = 1; r < symbol->rows; r++) {
@@ -617,11 +617,11 @@ int svg_plot(struct zint_symbol *symbol) {
                     }
                 }
             }
-            if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
+            if ((symbol->output_options & BARCODE_BOX) || (symbol->output_options & BARCODE_BIND)) {
                 fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", 0.0, 0.0, (symbol->width + xoffset + xoffset) * scaler, symbol->border_width * scaler);
                 fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", 0.0, (symbol->height + symbol->border_width) * scaler, (symbol->width + xoffset + xoffset) * scaler, symbol->border_width * scaler);
             }
-            if ((symbol->output_options & BARCODE_BOX) != 0) {
+            if (symbol->output_options & BARCODE_BOX) {
                 /* side bars */
                 fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", 0.0, 0.0, symbol->border_width * scaler, (symbol->height + (2 * symbol->border_width)) * scaler);
                 fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (symbol->width + xoffset + xoffset - symbol->border_width) * scaler, 0.0, symbol->border_width * scaler, (symbol->height + (2 * symbol->border_width)) * scaler);
diff --git a/backend_qt4/qzint.cpp b/backend_qt4/qzint.cpp
index 93dd956f..eb199fd9 100644
--- a/backend_qt4/qzint.cpp
+++ b/backend_qt4/qzint.cpp
@@ -331,7 +331,7 @@ namespace Zint {
             gwidth *= (maxi_width + 1);
         }
 
-        if (m_zintSymbol->output_options &= BARCODE_DOTTY_MODE) {
+        if (m_zintSymbol->output_options & BARCODE_DOTTY_MODE) {
             gwidth += 2.0;
             gheight += 2.0;
         }
@@ -476,7 +476,7 @@ namespace Zint {
             painter.drawEllipse(QPointF(14.5 * w, 16.5 * w * 0.868), w + w * 1.5, w + w * 1.5);
             painter.drawEllipse(QPointF(14.5 * w, 16.5 * w * 0.868), w + w * 3, w + w * 3);
             painter.restore();
-        } else if (m_zintSymbol->output_options &= BARCODE_DOTTY_MODE) {
+        } else if (m_zintSymbol->output_options & BARCODE_DOTTY_MODE) {
             /* Draw with dots (circles) */
 
             p.setColor(m_fgColor);