diff --git a/app/controllers/api/databases.php b/app/controllers/api/databases.php
index 414bec3c4a..8df90b8fcf 100644
--- a/app/controllers/api/databases.php
+++ b/app/controllers/api/databases.php
@@ -1752,15 +1752,14 @@ App::get('/v1/databases/:databaseId/collections/:collectionId/indexes/:key')
         $indexes = $collection->getAttribute('indexes');
 
         // Search for index
-        $indexIndex = array_search($key, array_column($indexes, 'key'));
+        $indexIndex = array_search($key, array_map(fn($idx) => $idx['key'], $indexes));
 
         if ($indexIndex === false) {
             throw new Exception(Exception::INDEX_NOT_FOUND);
         }
 
-        $index = new Document([\array_merge($indexes[$indexIndex], [
-            'collectionId' => $database->getInternalId() . '_' . $collectionId,
-        ])]);
+        $index = $indexes[$indexIndex];
+        $index->setAttribute('collectionId', $database->getInternalId() . '_' . $collectionId);
 
         $response->dynamic($index, Response::MODEL_INDEX);
     });