diff --git a/fail2ban/server/failregex.py b/fail2ban/server/failregex.py
index d343dbe0..12b8986a 100644
--- a/fail2ban/server/failregex.py
+++ b/fail2ban/server/failregex.py
@@ -274,7 +274,7 @@ class FailRegex(Regex):
 		for grp in groups:
 			try:
 				fid = self._matchCache.group(grp)
-			except IndexError:
+			except (IndexError, KeyError):
 				continue
 			if fid is not None:
 				break