diff --git a/inc/auth/mysql.class.php b/inc/auth/mysql.class.php
index 3d5af364027bab0da153c126741b2c80af9f137e..26cfb85d98580240cd9edce9f3cccdfe8d0549a8 100644
--- a/inc/auth/mysql.class.php
+++ b/inc/auth/mysql.class.php
@@ -772,6 +772,10 @@ class auth_mysql extends auth_basic {
      * @author Matthias Grimm <matthiasgrimm@users.sourceforge.net>
      */
     function _queryDB($query) {
+      if($this->cnf['debug'] >= 2){
+        msg('MySQL query: '.hsc($query),0,__LINE__,__FILE__);
+      }
+
       $resultarray = array();
       if ($this->dbcon) {
         $result = @mysql_query($query,$this->dbcon);