diff --git a/control/Session.php b/control/Session.php
index e86616da7..d0326c5f4 100644
--- a/control/Session.php
+++ b/control/Session.php
@@ -415,7 +415,7 @@ class Session {
 	protected function recursivelyApply($data, &$dest) {
 		foreach($data as $k => $v) {
 			if(is_array($v)) {
-				if(!isset($dest[$k])) $dest[$k] = array();
+				if(!isset($dest[$k]) || !is_array($dest[$k])) $dest[$k] = array();
 				$this->recursivelyApply($v, $dest[$k]);
 			} else {
 				$dest[$k] = $v;