diff --git a/backend/codablock.c b/backend/codablock.c
index 8a7d548a..46a7d7b6 100644
--- a/backend/codablock.c
+++ b/backend/codablock.c
@@ -699,13 +699,13 @@ int codablock(struct zint_symbol *symbol, unsigned char source[], int length) {
             columns = ((int)floor(sqrt(1.0*dataLength))+5);
             if (columns > 64)
                 columns = 64;
-                #ifdef _DEBUG
-                printf("Auto column count for %d characters:%d\n",dataLength,columns);
-                #endif
+                #ifdef _DEBUG
+                printf("Auto column count for %d characters:%d\n",dataLength,columns);
+                #endif
         }
     }
-    /* There are 5 Codewords for Organisation Start(2),row(1),CheckSum,Stop */
-    useColumns = columns - 5;
+    /* There are 5 Codewords for Organisation Start(2),row(1),CheckSum,Stop */
+    useColumns = columns - 5;
     if ( rows > 0 ) {
         /* row count given */
         Error=Rows2Columns(T,data,dataLength,&rows,&useColumns,pSet,&fillings);
@@ -984,6 +984,7 @@ int codablock(struct zint_symbol *symbol, unsigned char source[], int length) {
         }
         expand(symbol, dest);
     }
+    set_minimum_height(symbol, 8);
     
     if (!(symbol->output_options & BARCODE_BIND)) {
         symbol->output_options += BARCODE_BIND;
diff --git a/backend/common.c b/backend/common.c
index 5cd39a64..ad597a5f 100644
--- a/backend/common.c
+++ b/backend/common.c
@@ -286,10 +286,12 @@ void set_minimum_height(struct zint_symbol *symbol, int min_height) {
         }
     }
     
-    if (((symbol->height - fixed_height) / zero_count) < min_height) {
-        for (i = 0; i < symbol->rows; i++) {
-            if (symbol->row_height[i] == 0) {
-                symbol->row_height[i] = min_height;
+    if (zero_count > 0) {
+        if (((symbol->height - fixed_height) / zero_count) < min_height) {
+            for (i = 0; i < symbol->rows; i++) {
+                if (symbol->row_height[i] == 0) {
+                    symbol->row_height[i] = min_height;
+                }
             }
         }
     }
diff --git a/backend/library.c b/backend/library.c
index 420f0b4e..401c089c 100644
--- a/backend/library.c
+++ b/backend/library.c
@@ -50,7 +50,7 @@ struct zint_symbol *ZBarcode_Create() {
 
     memset(symbol, 0, sizeof (*symbol));
     symbol->symbology = BARCODE_CODE128;
-    symbol->height = 0;
+    symbol->height = 50;
     symbol->whitespace_width = 0;
     symbol->border_width = 0;
     symbol->output_options = 0;