diff --git a/config.cfg b/config.cfg
index 98c84b3..fe3eba0 100644
--- a/config.cfg
+++ b/config.cfg
@@ -10,7 +10,7 @@ domain = "auth.example.org"
 # zone name server
 nsname = "auth.example.org"
 # admin email address, where "@" is substituted with dot (".")
-# any dots in email username must be escaped with "\", e.g. firstname\.lastname.example.com
+# any dots in email username must be escaped with double-slash ("\\"), e.g. firstname\\.lastname.example.com
 nsadmin = "admin.example.org"
 # predefined records served in addition to the TXT
 records = [