diff --git a/ubb-patgen/Makefile b/ubb-patgen/Makefile
index a91f142..fbb7167 100644
--- a/ubb-patgen/Makefile
+++ b/ubb-patgen/Makefile
@@ -11,7 +11,7 @@
 #
 
 CC = mipsel-openwrt-linux-gcc
-CFLAGS = -g -Wall -O1 -I../libubb/include
+CFLAGS = -g -Wall -O0 -I../libubb/include
 LDFLAGS =
 LDLIBS = -L../libubb -lubb -lm -lrt