diff --git a/emfield.module b/emfield.module
index b230f61..a881635 100644
--- a/emfield.module
+++ b/emfield.module
@@ -99,10 +99,10 @@ function emfield_widget_value($element, $input = FALSE, $form_state) {
     // "uri [fid:n]".
     $fid = $element['#default_value'];
     if (!empty($fid)) {
-      $q = db_select('file_managed', 'f');
-      $q->addField('f', 'uri');
+      $q = db_select('file_managed', 'fm');
+      $q->addField('fm', 'uri');
       $q->addTag('file_access')
-        ->condition('f.fid', $fid['fid'])
+        ->condition('fm.fid', $fid['fid'])
         ->range(0, 1);
       $result = $q->execute();
       // @todo If no result (file doesn't exist or no access).