diff --git a/base64_dec.c b/base64_dec.c
index 349a48c..f057f54 100644
--- a/base64_dec.c
+++ b/base64_dec.c
@@ -31,8 +31,9 @@
 
 #include "test_src/cli.h"
 
-#define USE_GCC_EXTENSION
-
+/*
+ #define USE_GCC_EXTENSION
+*/
 #if 1
 
 #ifdef USE_GCC_EXTENSION