diff --git a/tools/single_use/migrate_instrument_permissions.php b/tools/single_use/migrate_instrument_permissions.php
index 731ce9e0c20..10eb93b38a9 100644
--- a/tools/single_use/migrate_instrument_permissions.php
+++ b/tools/single_use/migrate_instrument_permissions.php
@@ -11,7 +11,7 @@
     return;
 }
 
-foreach ($configSettings['instrument'] as $row) {
+foreach (\Utility::associativeToNumericArray($configSettings['instrument']) as $row) {
     $testID = $DB->pselectOne(
         "SELECT ID FROM test_names WHERE test_name=:tn",
         ['tn' => $row['Test_name']],