diff --git a/doc/man/man3/ldap_bind.3 b/doc/man/man3/ldap_bind.3
index 009f3697dc..ea47b3b51f 100644
--- a/doc/man/man3/ldap_bind.3
+++ b/doc/man/man3/ldap_bind.3
@@ -222,7 +222,11 @@ See the Cyrus SASL documentation for more details.
 .LP
 Applications which need to manage connections asynchronously may use
 .BR ldap_sasl_interactive_bind ()
-instead of the synchronous version. The parameters are the same as
+instead of the synchronous version.
+A valid mechs parameter must be supplied, otherwise the library will
+be forced to query the server for a list of supported mechanisms,
+and this query will be performed synchronously.
+The other parameters are the same as
 for the synchronous function, with three additional parameters.
 The actual SASL mechanism that was used, and the message ID for use
 with