--- a/road_cmd.c	Sun Jan 09 20:45:07 2005 +0000
+++ b/road_cmd.c	Sun Jan 09 21:25:44 2005 +0000
@@ -399,7 +399,7 @@
 				goto do_clear;
 
 		/* only allow roads pertendicular to bridge */
-		if ((pieces & 5) == (ti.map5 & 0x01))
+		if ((pieces & 5U) == (ti.map5 & 0x01U))
 				goto do_clear;
 
 		/* check if clear land under bridge */