diff --git a/BaS_gcc/Makefile b/BaS_gcc/Makefile
index ca5b0ff..16fb1c1 100644
--- a/BaS_gcc/Makefile
+++ b/BaS_gcc/Makefile
@@ -33,7 +33,7 @@ NATIVECC=gcc
 INCLUDE=-Iinclude
 CFLAGS=-mcpu=5474 \
 		-Wall \
-		-O2 \
+		-Os \
 		-g \
 		-fomit-frame-pointer \
 		-ffreestanding \