diff --git a/core/src-c/strutil.c b/core/src-c/strutil.c
index 06be599..57d694b 100644
--- a/core/src-c/strutil.c
+++ b/core/src-c/strutil.c
@@ -12,7 +12,10 @@ bool_t rr_strings_equal(const char *string1, const char *string2)
 {
     usz_t index = 0;
     while(string1[index] == string2[index])
+    {
         if(string1[index] == ZERO) return TRUE;
+        ++index;
+    }
     return FALSE;
 }
 
@@ -23,6 +26,7 @@ bool_t rr_strings_equal_up_to(const char *string1, const char *string2, usz_t ma
     {
         if(string1[index] == ZERO) return TRUE;
         if(index >= max_length) return TRUE;
+        ++index;
     }
     return FALSE;
 }