diff --git a/luci-app-openmptcprouter/luasrc/controller/openmptcprouter.lua b/luci-app-openmptcprouter/luasrc/controller/openmptcprouter.lua
index b800db0ea..d3ae4ef7d 100644
--- a/luci-app-openmptcprouter/luasrc/controller/openmptcprouter.lua
+++ b/luci-app-openmptcprouter/luasrc/controller/openmptcprouter.lua
@@ -46,7 +46,7 @@ function wizard_add()
 		gostatus = false
 	end
 
-	local delete_intf = luci.http.formvaluetable("delete")
+	local delete_intf = luci.http.formvaluetable("delete") or ""
 	if delete_intf ~= "" then
 		for intf, _ in pairs(delete_intf) do
 			ucic:delete("network",intf)