diff --git a/target/linux/mxs/image/gen_sdcard_vfat_ext4.sh b/target/linux/mxs/image/gen_sdcard_vfat_ext4.sh
index bca664c780..9d2b7c46a8 100755
--- a/target/linux/mxs/image/gen_sdcard_vfat_ext4.sh
+++ b/target/linux/mxs/image/gen_sdcard_vfat_ext4.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 #
 # Copyright (C) 2015 OpenWrt.org
 #