diff --git a/vm/Makefile b/vm/Makefile
index 5b9e5ac2b45d191329e2856765a5379d91980151..242c4e0e931b861b218148e3f16935630357b172 100755
--- a/vm/Makefile
+++ b/vm/Makefile
@@ -2,7 +2,7 @@
 
 CFLAGS=\
 	-g \
-	-O2 \
+	-O0 \
 	\
 	-Wall \
 #	-Werror \