diff --git a/target/linux/mediatek/image/gen_mt7623_emmc_img.sh b/target/linux/mediatek/image/gen_mt7623_emmc_img.sh
index 1cb0883fb0..a5f296ef14 100755
--- a/target/linux/mediatek/image/gen_mt7623_emmc_img.sh
+++ b/target/linux/mediatek/image/gen_mt7623_emmc_img.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
 OUTPUT_FILE=$1
 KERNEL_FILE=$2