diff --git a/backend/library.c b/backend/library.c
index 13bb009e..54162e0c 100644
--- a/backend/library.c
+++ b/backend/library.c
@@ -819,11 +819,6 @@ int ZBarcode_Encode(struct zint_symbol *symbol, const unsigned char *source,int
     unsigned char* local_source;
 #endif
     error_number = 0;
-
-    for (i = 0; i < in_length; i++) {
-        printf("%X ", (int) source[i]);
-    }
-    printf("\n");
     
     if (in_length == 0) {
         in_length = (int)ustrlen(source);