diff --git a/addons/web/static/src/js/coresetup.js b/addons/web/static/src/js/coresetup.js
index 7ddefa301f2..8b12f39c5e4 100644
--- a/addons/web/static/src/js/coresetup.js
+++ b/addons/web/static/src/js/coresetup.js
@@ -543,12 +543,12 @@ instance.web._lt = function (s) {
     return {toString: function () { return instance.web._t(s); }}
 };
 instance.web.qweb = new QWeb2.Engine();
-instance.web.qweb.default_dict['__debug__'] = instance.session.debug; // Which one ?
 instance.web.qweb.debug = instance.session.debug;
 instance.web.qweb.default_dict = {
     '_' : _,
     '_t' : instance.web._t,
     'JSON': JSON,
+    '__debug__': instance.session.debug,
 };
 instance.web.qweb.preprocess_node = function() {
     // Note that 'this' is the Qweb Node