diff --git a/src/newgrf_house.cpp b/src/newgrf_house.cpp
--- a/src/newgrf_house.cpp
+++ b/src/newgrf_house.cpp
@@ -291,6 +291,7 @@ static void NewHouseResolver(ResolverObj
 	res->last_value      = 0;
 	res->trigger         = 0;
 	res->reseed          = 0;
+	res->count           = 0;
 }
 
 uint16 GetHouseCallback(CallbackID callback, uint32 param1, uint32 param2, HouseID house_id, Town *town, TileIndex tile)