diff --git a/config/filter.d/courier-auth.conf b/config/filter.d/courier-auth.conf
index 9df74994..1ac33736 100644
--- a/config/filter.d/courier-auth.conf
+++ b/config/filter.d/courier-auth.conf
@@ -11,7 +11,7 @@ before = common.conf
 
 _daemon = (?:courier)?(?:imapd?|pop3d?)(?:login)?(?:-ssl)?
 
-failregex = ^%(__prefix_line)sLOGIN FAILED, (user|method)=.*, ip=\[<HOST>\]$
+failregex = ^%(__prefix_line)sLOGIN FAILED, (?:user|method)=.*, ip=\[<HOST>\]$
 
 ignoreregex =