diff --git a/packages/sysutils/module-init-tools/build b/packages/sysutils/module-init-tools/build
index 0a5a2e66d9..20a4d062bc 100755
--- a/packages/sysutils/module-init-tools/build
+++ b/packages/sysutils/module-init-tools/build
@@ -4,6 +4,8 @@
 
 $SCRIPTS/build toolchain
 
+export CFLAGS="-Os"
+
 cd $PKG_BUILD
 
 mkdir -p .build-target