diff --git a/AUTHORS b/AUTHORS
index 138fff37fb39..1b8712947074 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -143,3 +143,4 @@ Jonas Jelten <jelten@in.tum.de>
 Christine Lytwynec <clytwynec@edx.org>
 John Cox <johncox@google.com>
 Ben Weeks <benweeks@mit.edu>
+Sébastien Hinderer <Sebastien.Hinderer@inria.fr>
diff --git a/cms/envs/devstack.py b/cms/envs/devstack.py
index 046fc9bfee56..6118eb3018e7 100644
--- a/cms/envs/devstack.py
+++ b/cms/envs/devstack.py
@@ -59,7 +59,8 @@
 )
 
 DEBUG_TOOLBAR_CONFIG = {
-    'INTERCEPT_REDIRECTS': False
+    'INTERCEPT_REDIRECTS': False,
+    'SHOW_TOOLBAR_CALLBACK': lambda _: True,
 }
 
 # To see stacktraces for MongoDB queries, set this to True.