diff --git a/module/VuFind/src/VuFind/ILS/Driver/PAIA.php b/module/VuFind/src/VuFind/ILS/Driver/PAIA.php
index b61780ee826cae176cd867d9a3c7eed780fde32c..c055cc7ff3046f0314bd6e4f1dce9d361eba2ac5 100644
--- a/module/VuFind/src/VuFind/ILS/Driver/PAIA.php
+++ b/module/VuFind/src/VuFind/ILS/Driver/PAIA.php
@@ -293,7 +293,7 @@ class PAIA extends DAIA
             $elements = $array_response['doc'];
             foreach ($elements as $element) {
                 $item_id = $element['item'];
-                if ($element['error']) {
+                if ($element['error'] ?? false) {
                     $details[$item_id] = [
                         'success' => false,
                         'status' => $element['error'],