diff --git a/config/filter.d/haproxy-http-auth.conf b/config/filter.d/haproxy-http-auth.conf
index d85f5e9e..f92f9d67 100644
--- a/config/filter.d/haproxy-http-auth.conf
+++ b/config/filter.d/haproxy-http-auth.conf
@@ -28,7 +28,7 @@ _daemon = haproxy
 #          (?:::f{4,6}:)?(?P<host>[\w\-.^_]+)
 # Values:  TEXT
 #
-failregex = ^%(__prefix_line)s<HOST>:\d+.*<NOSRV> -1/-1/-1/-1/\+*\d* 401
+failregex = ^%(__prefix_line)s<HOST>(?::\d+)?\s+.*<NOSRV> -1/-1/-1/-1/\+*\d* 401
 
 # Option:  ignoreregex
 # Notes.:  regex to ignore. If this regex matches, the line is ignored.