--- a/src/ai/api/ai_industry.cpp	Fri Jul 13 14:14:26 2007 +0000
+++ b/src/ai/api/ai_industry.cpp	Fri Jul 13 14:44:31 2007 +0000
@@ -36,7 +36,7 @@
 	return industry_name;
 }
 
-/* static */ TileIndex AIIndustry::GetProduction(IndustryID industry_id, CargoID cargo_id)
+/* static */ int32 AIIndustry::GetProduction(IndustryID industry_id, CargoID cargo_id)
 {
 	if (!AIIndustry::IsValidIndustry(industry_id)) return -1;
 	if (!AICargo::IsValidCargo(cargo_id)) return -1;