diff --git a/config.inc.php b/config.inc.php
index b95851e1..91b52a53 100644
--- a/config.inc.php
+++ b/config.inc.php
@@ -137,7 +137,7 @@ $CONF['smtp_client'] = '';
 // system = whatever you have set as your PHP system default
 // cleartext = clear text passwords (ouch!)
 // mysql_encrypt = useful for PAM integration
-// authlib = support for courier-authlib style passwords
+// authlib = support for courier-authlib style passwords - also set $CONF['authlib_default_flavor']
 // dovecot:CRYPT-METHOD = use dovecotpw -s 'CRYPT-METHOD'. Example: dovecot:CRAM-MD5
 //     IMPORTANT:
 //     - don't use dovecot:* methods that include the username in the hash - you won't be able to login to PostfixAdmin in this case
@@ -146,6 +146,7 @@ $CONF['smtp_client'] = '';
 $CONF['encrypt'] = 'md5crypt';
 
 // In what flavor should courier-authlib style passwords be encrypted?
+// (only used if $CONF['encrypt'] == 'authlib')
 // md5 = {md5} + base64 encoded md5 hash
 // md5raw = {md5raw} + plain encoded md5 hash
 // SHA = {SHA} + base64-encoded sha1 hash