diff --git a/src/agenda_culturel/templatetags/contactmessages_extra.py b/src/agenda_culturel/templatetags/contactmessages_extra.py
index c556d79..09ad428 100644
--- a/src/agenda_culturel/templatetags/contactmessages_extra.py
+++ b/src/agenda_culturel/templatetags/contactmessages_extra.py
@@ -18,7 +18,7 @@ def show_badge_contactmessages(placement="top"):
         return mark_safe(
             '<a href="'
             + reverse_lazy("contactmessages")
-            + '?closed=false" class="badge" data-placement="'
+            + '?closed=False" class="badge" data-placement="'
             + placement
             + '"data-tooltip="'
             + str(nb_open)