diff --git a/config/filter.d/apache-auth.conf b/config/filter.d/apache-auth.conf
index 2b1397cf..811017e3 100644
--- a/config/filter.d/apache-auth.conf
+++ b/config/filter.d/apache-auth.conf
@@ -44,6 +44,7 @@ failregex = ^%(_apache_error_client)s (AH01797: )?client denied by server config
             ^%(_apache_error_client)s (AH01777: )?invalid nonce .* received - user attempted time travel\s*$
             ^%(_apache_error_client)s (AH01778: )?user .*: nonce expired \([\d.]+ seconds old - max lifetime [\d.]+\) - sending new nonce\s*$
             ^%(_apache_error_client)s (AH01779: )?user .*: one-time-nonce mismatch - sending new nonce\s*$
+            ^%(_apache_error_client)s (AH02486: )?realm mismatch - got `.*' but no realm specified\s*$