diff --git a/src/wp-includes/SimplePie/Sanitize.php b/src/wp-includes/SimplePie/Sanitize.php
index 442e8e219c..1ce047a3f9 100644
--- a/src/wp-includes/SimplePie/Sanitize.php
+++ b/src/wp-includes/SimplePie/Sanitize.php
@@ -315,7 +315,7 @@ class SimplePie_Sanitize
 							}
 							else
 							{
-								$file = $this->registry->create('File', array($img['attribs']['src']['data'], $this->timeout, 5, array('X-FORWARDED-FOR' => $_SERVER['REMOTE_ADDR']), $this->useragent, $this->force_fsockopen));
+								$file = $this->registry->create('File', array($img->getAttribute('src'), $this->timeout, 5, array('X-FORWARDED-FOR' => $_SERVER['REMOTE_ADDR']), $this->useragent, $this->force_fsockopen));
 								$headers = $file->headers;
 
 								if ($file->success && ($file->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($file->status_code === 200 || $file->status_code > 206 && $file->status_code < 300)))