diff --git a/etc/inc/filter.inc b/etc/inc/filter.inc
index 48d0f9ef24..2b84716863 100644
--- a/etc/inc/filter.inc
+++ b/etc/inc/filter.inc
@@ -158,7 +158,7 @@ function filter_configure_sync() {
 		$rules.= "set limit states {$config['system']['maximumstates']}\n";
 	}
 	$rules.= "\n";
-	$rules.= "scrub on {$wanif} all {$scrubnodf} {$mssclamp}\n"; // reassemble all directions
+	$rules.= "scrub on {$wanif} all {$scrubnodf} {$mssclamp} random-id\n"; // reassemble all directions
     
 	update_filter_reload_status("Setting up SCRUB information");