diff --git a/media.install b/media.install
index ad86f2b..7bbd941 100644
--- a/media.install
+++ b/media.install
@@ -900,9 +900,9 @@ function media_update_7209() {
 
   $query = db_select('file_managed', 'f')
     ->fields('f', array('fid', 'type', 'filemime', 'uri'));
-  $files = $query->execute()->fetchAllAssoc('fid');
+  $files = $query->execute();
   $failed = array();
-  foreach ($files as $fid => $file) {
+  foreach ($files as $file) {
     if (empty($file->filemime)) {
       $file->filemime = file_get_mimetype($file->uri);
     }