diff --git a/config/filter.d/sasl.conf b/config/filter.d/sasl.conf
index 5cd8a6d5..e316605f 100644
--- a/config/filter.d/sasl.conf
+++ b/config/filter.d/sasl.conf
@@ -14,7 +14,7 @@
 #          (?:::f{4,6}:)?(?P<host>[\w\-.^_]+)
 # Values: TEXT
 #
-failregex = (?i): warning: [-._\w]+\[<HOST>\]: SASL (?:LOGIN|PLAIN|(?:CRAM|DIGEST)-MD5) authentication failed(: [A-Za-z0-9+/]*={0,2})?$
+failregex = (?i): warning: [-._\w]+\[<HOST>\]: SASL (?:LOGIN|PLAIN|(?:CRAM|DIGEST)-MD5) authentication failed(: [ A-Za-z0-9+/]*={0,2})?$
 
 # Option:  ignoreregex
 # Notes.:  regex to ignore. If this regex matches, the line is ignored.