diff --git a/config/main.inc.php.dist b/config/main.inc.php.dist
index 7e07341a9..a6661c323 100644
--- a/config/main.inc.php.dist
+++ b/config/main.inc.php.dist
@@ -78,7 +78,7 @@ $rcmail_config['default_host'] = '';
 // TCP port used for IMAP connections
 $rcmail_config['default_port'] = 143;
 
-// IMAP AUTH type (DIGEST-MD5, CRAM-MD5, LOGIN, PLAIN or empty to use
+// IMAP AUTH type (DIGEST-MD5, CRAM-MD5, LOGIN, PLAIN or null to use
 // best server supported one)
 $rcmail_config['imap_auth_type'] = null;