diff --git a/utf8.c b/utf8.c
--- a/utf8.c
+++ b/utf8.c
@@ -40,5 +40,6 @@
     }
 
     printf ("DIFF: %d : 0x%2X\n", 0x40, 0x40);
-    return 0;
+
+    return EXIT_SUCCESS;
 }