diff --git a/module/VuFind/src/VuFind/ILS/Driver/KohaILSDI.php b/module/VuFind/src/VuFind/ILS/Driver/KohaILSDI.php
index 1a907fb3e27e257b6e27c0e0ec92c13a453b13da..a65ceed3d4ddbb3fe2ba081e15a69f5bc5a33dc8 100644
--- a/module/VuFind/src/VuFind/ILS/Driver/KohaILSDI.php
+++ b/module/VuFind/src/VuFind/ILS/Driver/KohaILSDI.php
@@ -651,7 +651,7 @@ class KohaILSDI extends \VuFind\ILS\Driver\AbstractBase implements
             ];
         }
 
-        $this->debug("patron: " . $patron);
+        $this->debug("patron: " . print_r($patron, true));
         $this->debug("patron_id: " . $patron_id);
         $this->debug("request_location: " . $request_location);
         $this->debug("item_id: " . $item_id);