diff --git a/package/lean/luci-app-usb-printer/root/usr/bin/usb_printer_hotplug b/package/lean/luci-app-usb-printer/root/usr/bin/usb_printer_hotplug
index e0a60b003..16b4ccc4d 100755
--- a/package/lean/luci-app-usb-printer/root/usr/bin/usb_printer_hotplug
+++ b/package/lean/luci-app-usb-printer/root/usr/bin/usb_printer_hotplug
@@ -36,7 +36,7 @@ check_printer() {
 		return
 	fi
 
-	device_file=`echo $DEVICES | grep $device_id | cut -d , -f 1`
+	device_file=`echo "$DEVICES" | grep $device_id | cut -d , -f 1`
 
 	if [ "$ACTION" = "add" ] && [ -z "$device_file" ]; then
 		return