diff --git a/C4/Auth_with_ldap.pm b/C4/Auth_with_ldap.pm
index 99c80c22d5..ba217fa09a 100644
--- a/C4/Auth_with_ldap.pm
+++ b/C4/Auth_with_ldap.pm
@@ -315,6 +315,9 @@ sub _do_changepassword {
 "Unable to access borrowernumber with userid=$userid, borrowernumber=$borrowerid"
           if !$sth->rows;
         my ($cardnum) = $sth->fetchrow;
+        my $sth = C4::Context->dbh->prepare(
+            'UPDATE borrowers SET password = null WHERE borrowernumber=?');
+        $sth->execute($borrowerid);
         return $cardnum;
     }
     my $digest = hash_password($password);