diff --git a/library/Icinga/Web/Widget/AbstractWidget.php b/library/Icinga/Web/Widget/AbstractWidget.php
index fe4d2434d..5b9d8876b 100644
--- a/library/Icinga/Web/Widget/AbstractWidget.php
+++ b/library/Icinga/Web/Widget/AbstractWidget.php
@@ -34,7 +34,7 @@ abstract class AbstractWidget
     protected static $view;
 
     // TODO: Should we kick this?
-    protected $properties;
+    protected $properties = array();
 
     /**
      * Getter for widget properties