diff --git a/package/lean/luci-app-docker/root/etc/docker-init b/package/lean/luci-app-docker/root/etc/docker-init
index b00ea26afb..9bade865ff 100755
--- a/package/lean/luci-app-docker/root/etc/docker-init
+++ b/package/lean/luci-app-docker/root/etc/docker-init
@@ -1,5 +1,5 @@
 #!/bin/sh
-dtype=`fdisk -l | grep 'Disklabel type' | awk '{print $3}'`
+dtype=`fdisk -l /dev/sda | grep 'Disklabel type' | awk '{print $3}'`
 partid="0"
 
 if [ "$dtype" = "gpt" ]