diff --git a/src/luascript.cpp b/src/luascript.cpp
index b55a21e29c..0bde307b55 100644
--- a/src/luascript.cpp
+++ b/src/luascript.cpp
@@ -2691,6 +2691,7 @@ void LuaScriptInterface::registerFunctions()
 	registerMethod("ItemType", "isMagicField", LuaScriptInterface::luaItemTypeIsMagicField);
 	registerMethod("ItemType", "isUseable", LuaScriptInterface::luaItemTypeIsUseable);
 	registerMethod("ItemType", "isPickupable", LuaScriptInterface::luaItemTypeIsPickupable);
+	registerMethod("ItemType", "isKey", LuaScriptInterface::luaItemTypeIsKey);
 
 	registerMethod("ItemType", "getType", LuaScriptInterface::luaItemTypeGetType);
 	registerMethod("ItemType", "getGroup", LuaScriptInterface::luaItemTypeGetGroup);
@@ -11899,6 +11900,18 @@ int LuaScriptInterface::luaItemTypeIsPickupable(lua_State* L)
 	return 1;
 }
 
+int LuaScriptInterface::luaItemTypeIsKey(lua_State* L)
+{
+	// itemType:isKey()
+	const ItemType* itemType = getUserdata<const ItemType>(L, 1);
+	if (itemType) {
+		pushBoolean(L, itemType->isKey());
+	} else {
+		lua_pushnil(L);
+	}
+	return 1;
+}
+
 int LuaScriptInterface::luaItemTypeGetType(lua_State* L)
 {
 	// itemType:getType()