diff --git a/core/modules/file/file.module b/core/modules/file/file.module
index 6bda7ae..6e50139 100644
--- a/core/modules/file/file.module
+++ b/core/modules/file/file.module
@@ -1308,7 +1308,7 @@ function file_managed_file_value(&$element, $input = FALSE, $form_state = NULL)
       // Load files if the FIDs have changed to confirm they exist.
       if (!empty($input['fids'])) {
         $fids = array();
-        foreach ($input['fids'] as $key => $fid) {
+        foreach ($input['fids'] as $fid) {
           if ($file = file_load($fid)) {
             $fids[] = $file->id();
           }
@@ -1331,7 +1331,7 @@ function file_managed_file_value(&$element, $input = FALSE, $form_state = NULL)
     // Confirm that the file exists when used as a default value.
     if (!empty($default_fids)) {
       $fids = array();
-      foreach ($default_fids as $key => $fid) {
+      foreach ($default_fids as $fid) {
         if ($file = file_load($fid)) {
           $fids[] = $file->id();
         }