diff --git a/module/VuFind/src/VuFind/ILS/Driver/KohaILSDI.php b/module/VuFind/src/VuFind/ILS/Driver/KohaILSDI.php
index ef29d8959cd51f0c5785a0a94f8668c94dea8832..c070a12b1be92827d1dac7d5b39525b568c69f4a 100644
--- a/module/VuFind/src/VuFind/ILS/Driver/KohaILSDI.php
+++ b/module/VuFind/src/VuFind/ILS/Driver/KohaILSDI.php
@@ -690,7 +690,7 @@ 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);