Index: sys/netgraph/ng_bridge.c
===================================================================
--- sys/netgraph/ng_bridge.c
+++ sys/netgraph/ng_bridge.c
@@ -764,7 +764,8 @@
 		 * This is safe without locking, because it's
 		 * the only operation during shared access.
 		 */
-		host->staleness = 0;
+		if (__predict_false(host->staleness > 0))
+			host->staleness = 0;
 
 		/* Did host jump to a different link? */
 		if (host->link != ctx.incoming) {