diff --git a/station_cmd.c b/station_cmd.c
index 73a8c7f1c2..c0a40892a2 100644
--- a/station_cmd.c
+++ b/station_cmd.c
@@ -93,7 +93,7 @@ static bool TileBelongsToRailStation(const Station *st, TileIndex tile)
 static void MarkStationTilesDirty(const Station *st)
 {
 	TileIndex tile = st->train_tile;
-	uint w, h;
+	int w, h;
 
 	// XXX No station is recorded as 0, not INVALID_TILE...
 	if (tile == 0) return;