diff --git a/config/filter.d/scanlogd.conf b/config/filter.d/scanlogd.conf
index 15fea329..d3fe78b0 100644
--- a/config/filter.d/scanlogd.conf
+++ b/config/filter.d/scanlogd.conf
@@ -10,7 +10,7 @@ before = common.conf
 
 _daemon = scanlogd
 
-failregex =  ^%(__prefix_line)s<ADDR>(?::<F-PORT/>) to \S+ ports\b
+failregex =  ^%(__prefix_line)s<ADDR>(?::<F-PORT/>)? to \S+ ports\b
 
 ignoreregex =