diff --git a/vc_zoom/indico_vc_zoom/templates/buttons.html b/vc_zoom/indico_vc_zoom/templates/buttons.html
index b0d5451..53f9f54 100644
--- a/vc_zoom/indico_vc_zoom/templates/buttons.html
+++ b/vc_zoom/indico_vc_zoom/templates/buttons.html
@@ -1,6 +1,6 @@
 {% macro render_make_me_owner(event, vc_room, event_vc_room, extra_classes='') %}
     {% if session.user.identifier != vc_room.data['host']
-          and session.user.identifier not in vc_room.data['alternative_hosts']
+          and session.user.identifier not in vc_room.data.get('alternative_hosts', [])
           and event.can_manage(session.user) %}
         <a class="i-button highlight arrow {{ extra_classes }}" data-toggle="dropdown"></a>
         <ul class="i-dropdown" data-level="level1">