diff --git a/medias_pipelines.php b/medias_pipelines.php
index 4e76f2297bd35b76b1444fcd7f661182d4e2d36b..3d5dd535af49542c3bbcdbdb14d31be9fd71ed42 100644
--- a/medias_pipelines.php
+++ b/medias_pipelines.php
@@ -35,6 +35,7 @@ if (!defined('_ECRIRE_INC_VERSION')) {
 function medias_detecter_fond_par_defaut($fond) {
 	if (empty($_GET) and empty($_POST) and empty($_FILES)
 		and isset($_SERVER['CONTENT_LENGTH'])
+		and isset($_SERVER['CONTENT_TYPE'])
 		and strstr($_SERVER['CONTENT_TYPE'], 'multipart/form-data;')
 	) {
 		include_spip('inc/getdocument');