--- a/command.h	Sun Jan 09 20:45:07 2005 +0000
+++ b/command.h	Sun Jan 09 21:25:44 2005 +0000
@@ -182,7 +182,7 @@
 int32 DoCommand(int x, int y, uint32 p1, uint32 p2, uint32 flags, uint procc);
 int32 DoCommandByTile(TileIndex tile, uint32 p1, uint32 p2, uint32 flags, uint procc);
 
-bool IsValidCommand(int cmd);
+bool IsValidCommand(uint cmd);
 int32 GetAvailableMoneyForCommand();
 
 #endif /* COMMAND_H */