diff --git a/OpenRA.Mods.Common/Widgets/Logic/MapGeneratorLogic.cs b/OpenRA.Mods.Common/Widgets/Logic/MapGeneratorLogic.cs
index 9fb859bd4f..bc45398eb2 100644
--- a/OpenRA.Mods.Common/Widgets/Logic/MapGeneratorLogic.cs
+++ b/OpenRA.Mods.Common/Widgets/Logic/MapGeneratorLogic.cs
@@ -76,7 +76,7 @@ namespace OpenRA.Mods.Common.Widgets.Logic
 		readonly Widget dropdownSettingTemplate;
 		readonly Widget tilesetSetting;
 		readonly Widget sizeSetting;
-		readonly IReadWritePackage package;
+		readonly ZipFileLoader.ReadWriteZipFile package;
 
 		ITerrainInfo selectedTerrain;
 		string selectedSize;