--- a/train_cmd.c	Sat Mar 18 13:20:50 2006 +0000
+++ b/train_cmd.c	Sat Mar 18 14:35:54 2006 +0000
@@ -1609,7 +1609,7 @@
 		}
 
 		if (flags & DC_EXEC) {
-			v->u.rail.flags ^= 1 << VRF_REVERSE_DIRECTION;
+			TOGGLEBIT(v->u.rail.flags, VRF_REVERSE_DIRECTION);
 		}
 	} else {
 		//turn the whole train around