diff --git a/library/Icinga/Web/Session/SessionNamespace.php b/library/Icinga/Web/Session/SessionNamespace.php
index 5b1d74068..9c49c3f63 100644
--- a/library/Icinga/Web/Session/SessionNamespace.php
+++ b/library/Icinga/Web/Session/SessionNamespace.php
@@ -52,7 +52,7 @@ class SessionNamespace implements IteratorAggregate
      */
     public function getIterator()
     {
-        return ArrayIterator($this->values);
+        return new ArrayIterator($this->values);
     }
 
     /**