diff --git a/ecrire/inc/ajouter_documents.php b/ecrire/inc/ajouter_documents.php
index 449a7233102a9f8caca121cb70c3e20fe32167d0..5ea743fa4f870c86b02eeb3d49bf492019998923 100644
--- a/ecrire/inc/ajouter_documents.php
+++ b/ecrire/inc/ajouter_documents.php
@@ -257,6 +257,7 @@ function ajouter_un_document($source, $nom_envoye, $type_lien, $id_lien, $mode,
 
 		// Appliquer l'exif orientation
 		// http://trac.rezo.net/trac/spip/ticket/1494
+		define('_TOURNER_SELON_EXIF', true); # par defaut c'est actif
 		if (defined('_TOURNER_SELON_EXIF')
 		AND _TOURNER_SELON_EXIF
 		AND $mode == 'document'