--- a/src/gui.h	Thu Jun 21 13:56:59 2007 +0000
+++ b/src/gui.h	Thu Jun 21 14:32:27 2007 +0000
@@ -105,7 +105,7 @@
 void ShowPlayerFinances(PlayerID player);
 void ShowPlayerCompany(PlayerID player);
 
-void ShowEstimatedCostOrIncome(int32 cost, int x, int y);
+void ShowEstimatedCostOrIncome(Money cost, int x, int y);
 void ShowErrorMessage(StringID msg_1, StringID msg_2, int x, int y);
 
 void DrawStationCoverageAreaText(int sx, int sy, uint mask,int rad);