diff -r 5de26c8fe2ef -r 14ecb0acdfb4 src/industry_cmd.cpp
--- a/src/industry_cmd.cpp	Mon Jun 18 19:42:48 2007 +0000
+++ b/src/industry_cmd.cpp	Mon Jun 18 19:53:50 2007 +0000
@@ -354,7 +354,7 @@
 	}
 
 	if (flags & DC_EXEC) DeleteIndustry(i);
-	return 0;
+	return CommandCost();
 }
 
 static void TransportIndustryGoods(TileIndex tile)
@@ -1505,7 +1505,7 @@
 
 	if (CreateNewIndustryHelper(tile, p1, flags, indspec, it) == NULL) return CMD_ERROR;
 
-	return (_price.build_industry >> 8) * indspec->cost_multiplier;
+	return CommandCost((_price.build_industry >> 8) * indspec->cost_multiplier);
 }