diff --git a/src/newgrf_industries.h b/src/newgrf_industries.h
--- a/src/newgrf_industries.h
+++ b/src/newgrf_industries.h
@@ -10,7 +10,7 @@
 
 /* in newgrf_industry.cpp */
 uint32 IndustryGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available);
-uint16 GetIndustryCallback(uint16 callback, uint32 param1, uint32 param2, Industry *industry, IndustryType type, TileIndex tile);
+uint16 GetIndustryCallback(CallbackID callback, uint32 param1, uint32 param2, Industry *industry, IndustryType type, TileIndex tile);
 uint32 GetIndustryIDAtOffset(TileIndex new_tile, TileIndex old_tile, const Industry *i);
 void IndustryProductionCallback(Industry *ind, int reason);
 bool CheckIfCallBackAllowsCreation(TileIndex tile, IndustryType type, uint itspec_index);