diff --git a/lib/classes/User/Query.php b/lib/classes/User/Query.php
index ad10d3c752..940ed9deaf 100644
--- a/lib/classes/User/Query.php
+++ b/lib/classes/User/Query.php
@@ -323,7 +323,7 @@ class User_Query implements User_QueryInterface
         }
 
         if ($this->last_model) {
-            $sql .= ' AND usr.lastModel = "' . mysql_real_escape_string($this->last_model) . '" ';
+            $sql .= ' AND usr.lastModel = ' . $this->app['phraseanet.appbox']->get_connection()->quote($this->last_model) . ' ';
         }
 
         $sql_like = array();