diff --git a/module/VuFind/src/VuFind/Connection/OpenLibrary.php b/module/VuFind/src/VuFind/Connection/OpenLibrary.php
index 8d983a38c182c7cedf87d19ebef02e3ce3c2cb0a..b2aeca1c1c9aca70d89c1cd0f9f764f4719af2be 100644
--- a/module/VuFind/src/VuFind/Connection/OpenLibrary.php
+++ b/module/VuFind/src/VuFind/Connection/OpenLibrary.php
@@ -49,6 +49,8 @@ class OpenLibrary
 
     /**
      * Constructor
+     *
+     * @param \Zend\Http\Client $client HTTP client
      */
     public function __construct(\Zend\Http\Client $client)
     {