diff --git a/interface/lib/app.inc.php b/interface/lib/app.inc.php
index 631bd430dafb6cb4a67d2e10d11c383ee4208493..8617c34b21c72fe8ca45b5b5d82aaf3fb0a7f586 100755
--- a/interface/lib/app.inc.php
+++ b/interface/lib/app.inc.php
@@ -130,8 +130,8 @@ 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'];
 		}
 
 	}