diff --git a/packages/sysutils/busybox/unpack b/packages/sysutils/busybox/unpack
index ba540f667b..8b5e7863a2 100755
--- a/packages/sysutils/busybox/unpack
+++ b/packages/sysutils/busybox/unpack
@@ -9,5 +9,5 @@ BUSYBOX=`ls -d $PKG_BUILD`
 cat <<EOF >>$BUSYBOX/Makefile.custom
 HOSTCC = $HOST_CC
 CROSS_COMPILE = $TARGET_PREFIX
-CFLAGS += -std=gnu99 
+CFLAGS += -std=gnu99 -Os
 EOF