diff --git a/src/town.h b/src/town.h
--- a/src/town.h
+++ b/src/town.h
@@ -212,8 +212,8 @@ inline TownLayout Town::GetActiveLayout(
 
 struct HouseSpec {
 	/* Standard properties */
-	Year min_date;                     ///< introduction year of the house
-	Year max_date;                     ///< last year it can be built
+	Year min_year;                     ///< introduction year of the house
+	Year max_year;                     ///< last year it can be built
 	byte population;                   ///< population (Zero on other tiles in multi tile house.)
 	byte removal_cost;                 ///< cost multiplier for removing it
 	StringID building_name;            ///< building name