--- a/src/ai/ai.h	Wed Jun 13 12:05:56 2007 +0000
+++ b/src/ai/ai.h	Tue Jun 19 07:21:01 2007 +0000
@@ -43,8 +43,8 @@
 void AI_RunGameLoop();
 void AI_Initialize();
 void AI_Uninitialize();
-int32 AI_DoCommand(TileIndex tile, uint32 p1, uint32 p2, uint32 flags, uint procc);
-int32 AI_DoCommandCc(TileIndex tile, uint32 p1, uint32 p2, uint32 flags, uint procc, CommandCallback* callback);
+CommandCost AI_DoCommand(TileIndex tile, uint32 p1, uint32 p2, uint32 flags, uint procc);
+CommandCost AI_DoCommandCc(TileIndex tile, uint32 p1, uint32 p2, uint32 flags, uint procc, CommandCallback* callback);
 
 /** Is it allowed to start a new AI.
  * This function checks some boundries to see if we should launch a new AI.