diff --git a/Services/ImageHandling.php b/Services/ImageHandling.php
index f56a1fd..3d03927 100644
--- a/Services/ImageHandling.php
+++ b/Services/ImageHandling.php
@@ -51,6 +51,11 @@ class ImageHandling
      */
     private $throwException;
 
+    /**
+     * @var string
+     */
+    private $fallbackImage;
+
     /**
      * @param string                               $cacheDirectory
      * @param int                                  $cacheDirMode