diff --git a/interface/lib/app.inc.php b/interface/lib/app.inc.php
index d609835f546a43d2ecc91ae678b7e43c17331435..0c15825ef5d55afcee87778ad2327960fece7bcf 100755
--- a/interface/lib/app.inc.php
+++ b/interface/lib/app.inc.php
@@ -132,8 +132,8 @@ class app {
 
 			//* Initialize session variables
 			if(!isset($_SESSION['s']['id']) ) $_SESSION['s']['id'] = session_id();
-			if(empty($_SESSION['s']['theme'])) $_SESSION['s']['theme'] = $conf['theme'];
-			if(empty($_SESSION['s']['language'])) $_SESSION['s']['language'] = $conf['language'];
+			if(empty($_SESSION['s']['theme'])) $_SESSION['s']['theme'] = $this->_conf['theme'];
+			if(empty($_SESSION['s']['language'])) $_SESSION['s']['language'] = $this->_conf['language'];
 		}
 
 	}