diff --git a/src/town_cmd.cpp b/src/town_cmd.cpp
--- a/src/town_cmd.cpp
+++ b/src/town_cmd.cpp
@@ -822,7 +822,7 @@ static void TownTickHandler(Town *t)
 				i = t->growth_rate;
 			} else {
 				/* If growth failed wait a bit before retrying */
-				i = std::min<uint16_t>(t->growth_rate, TOWN_GROWTH_TICKS - 1);
+				i = std::min<uint16_t>(t->growth_rate, Ticks::TOWN_GROWTH_TICKS - 1);
 			}
 		}
 		t->grow_counter = i;
@@ -1868,7 +1868,7 @@ static void DoCreateTown(Town *t, TileIn
 	t->cache.population = 0;
 	/* Spread growth across ticks so even if there are many
 	 * similar towns they're unlikely to grow all in one tick */
-	t->grow_counter = t->index % TOWN_GROWTH_TICKS;
+	t->grow_counter = t->index % Ticks::TOWN_GROWTH_TICKS;
 	t->growth_rate = TownTicksToGameTicks(250);
 	t->show_zone = false;
 
@@ -3236,7 +3236,7 @@ static CommandCost TownActionFundBuildin
 		 * tick-perfect and gives player some time window where they can
 		 * spam funding with the exact same efficiency.
 		 */
-		t->grow_counter = std::min<uint16_t>(t->grow_counter, 2 * TOWN_GROWTH_TICKS - (t->growth_rate - t->grow_counter) % TOWN_GROWTH_TICKS);
+		t->grow_counter = std::min<uint16_t>(t->grow_counter, 2 * Ticks::TOWN_GROWTH_TICKS - (t->growth_rate - t->grow_counter) % Ticks::TOWN_GROWTH_TICKS);
 
 		SetWindowDirty(WC_TOWN_VIEW, t->index);
 	}