diff --git a/module/VuFind/src/VuFind/ILS/Driver/SierraRest.php b/module/VuFind/src/VuFind/ILS/Driver/SierraRest.php
index 075b903fa7676ff09fc2e4961201c945b3d0925b..bbc2693dae11044b5509ec24690ad29e767f928a 100644
--- a/module/VuFind/src/VuFind/ILS/Driver/SierraRest.php
+++ b/module/VuFind/src/VuFind/ILS/Driver/SierraRest.php
@@ -1686,11 +1686,7 @@ class SierraRest extends AbstractBase implements TranslatorAwareInterface,
 
         $offset = 0;
         $limit = 50;
-        $fields = 'location,status,barcode,callNumber,fixedFields';
-        if ('m' !== ($bib['bibLevel']['code'] ?? null)) {
-            // Fetch varFields for volume information
-            $fields .= ',varFields';
-        }
+        $fields = 'location,status,barcode,callNumber,fixedFields,varFields';
         $statuses = [];
         $sort = 0;
         while (!isset($result) || $limit === $result['total']) {