diff --git a/src/town_cmd.cpp b/src/town_cmd.cpp
index 99bb0aacfc..eecf047869 100644
--- a/src/town_cmd.cpp
+++ b/src/town_cmd.cpp
@@ -1009,11 +1009,11 @@ void UpdateTownCargoes(Town *t)
 	t->cargo_produced = 0;
 
 	const TileArea &area = t->cargo_accepted.GetArea();
-	if (area.tile == INVALID_TILE) return;
-
-	/* Update acceptance for each grid square. */
-	TILE_AREA_LOOP_STEP(tile, area, AcceptanceMatrix::GRID) {
-		UpdateTownCargoesSingleGridArea(t, tile, false);
+	if (area.tile != INVALID_TILE) {
+		/* Update acceptance for each grid square. */
+		TILE_AREA_LOOP_STEP(tile, area, AcceptanceMatrix::GRID) {
+			UpdateTownCargoesSingleGridArea(t, tile, false);
+		}
 	}
 
 	/* Update the total acceptance. */