diff --git a/module/VuFind/src/VuFind/ILS/Driver/Virtua.php b/module/VuFind/src/VuFind/ILS/Driver/Virtua.php
index 7321e54814de15f19cf023661097687f9335919f..fe98b94e4b965ef4bb44adb618e8db9e865b8a6b 100644
--- a/module/VuFind/src/VuFind/ILS/Driver/Virtua.php
+++ b/module/VuFind/src/VuFind/ILS/Driver/Virtua.php
@@ -993,7 +993,7 @@ class Virtua extends AbstractBase implements \VuFindHttp\HttpServiceAwareInterfa
         // Prepare the set for sorting on '8' subfields, also move the tag data out
         $sort_set = array();
         // Loop through each sequence
-        foreach ($data_set as $seq => $row) {
+        foreach ($data_set as $row) {
             $sort = '';
             $tag  = '';
             $data = array();