diff -r f57c12df9a26 -r c1e19f08fc25 tunnelbridge_cmd.c
--- a/tunnelbridge_cmd.c	Wed Apr 12 05:19:19 2006 +0000
+++ b/tunnelbridge_cmd.c	Wed Apr 12 05:26:36 2006 +0000
@@ -84,7 +84,7 @@
 	BRIDGE_PARTLY_LEVELED_FOUNDATION = 1 << 1 | 1 << 2 | 1 << 4 | 1 << 8,
 	// no foundations (X,Y direction) (tileh's 0, 3, 6, 9, 12)
 	BRIDGE_NO_FOUNDATION = 1 << 0 | 1 << 3 | 1 << 6 | 1 << 9 | 1 << 12,
-	BRIDGE_HORZ_RAMP = (BRIDGE_PARTLY_LEVELED_FOUNDATION | BRIDGE_NO_FOUNDATION) & ~0
+	BRIDGE_HORZ_RAMP = (BRIDGE_PARTLY_LEVELED_FOUNDATION | BRIDGE_NO_FOUNDATION) & ~(1 << 0)
 };
 
 static inline const PalSpriteID *GetBridgeSpriteTable(int index, byte table)