diff --git a/src/settings.cpp b/src/settings.cpp
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1782,7 +1782,7 @@ CommandCost CmdChangePatchSetting(TileIn
 		InvalidateWindow(WC_GAME_OPTIONS, 0);
 	}
 
-	return 0;
+	return CommandCost();
 }
 
 /** Top function to save the new value of an element of the Patches struct