diff --git a/libraries/http_request.inc b/libraries/http_request.inc
index 24cc431..81a7f3c 100644
--- a/libraries/http_request.inc
+++ b/libraries/http_request.inc
@@ -56,7 +56,7 @@ function http_request_get_common_syndication($url, $settings = NULL) {
   // @see http_request_get.
   $downloaded_string = $download->data;
   // If this happens to be a feed then just return the url.
-  if (http_request_is_feed($download->headers['Content-Type'], $downloaded_string)) {
+  if (http_request_is_feed($download->headers['content-type'], $downloaded_string)) {
     return $url;
   }