diff --git a/etc/inc/filter.inc b/etc/inc/filter.inc
index 69b11cc988..a2f8b249cd 100644
--- a/etc/inc/filter.inc
+++ b/etc/inc/filter.inc
@@ -1821,7 +1821,7 @@ function filter_rules_generate() {
 		$cp_interface_real = convert_friendly_interface_to_real_interface_name($cp_interface);
 		$cp_interface_ip = find_interface_ip($cp_interface_real);
 		if($cp_interface_ip and $cp_interface_real)
-			$ipfrules .= "pass in quick on {$cp_interface_real} from any to {$cp_interface_ip} port { 8000-8001 } keep state\n";
+			$ipfrules .= "pass in quick on {$cp_interface_real} proto tcp from any to {$cp_interface_ip} port { 8000 8001 } keep state\n";
 	}
 
 	/* ftp-sesame */