diff --git a/definitions.lua b/definitions.lua
index c74de4da..ce875ecf 100644
--- a/definitions.lua
+++ b/definitions.lua
@@ -1,3 +1,20 @@
+-- This file is a part of the SteamWar software.
+--
+-- Copyright (C) 2021  SteamWar.de-Serverteam
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU Affero General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+-- GNU Affero General Public License for more details.
+--
+-- You should have received a copy of the GNU Affero General Public License
+-- along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 ---
 --- This file contains the definitions for the SteamWar.de script API.
 --- It is used by the IDE to provide code completion and type checking.