diff --git a/includes/MediaOEmbedStreamWrapper.inc b/includes/MediaOEmbedStreamWrapper.inc
index 0dd7c1c..31135fa 100644
--- a/includes/MediaOEmbedStreamWrapper.inc
+++ b/includes/MediaOEmbedStreamWrapper.inc
@@ -86,7 +86,7 @@ class MediaOEmbedStreamWrapper extends MediaReadOnlyStreamWrapper {
       // Attempt to get a URL to the file's original thumbnail.
       $url = $this->getOriginalThumbnailPath();
 
-      if (isset($url)) {
+      if (!empty($url)) {
         // Retrieve the original thumbnail.
         $result = drupal_http_request($url);