diff --git a/tabellio/agenda/portlet_agenda.pt b/tabellio/agenda/portlet_agenda.pt
index 459da65..1a09f15 100644
--- a/tabellio/agenda/portlet_agenda.pt
+++ b/tabellio/agenda/portlet_agenda.pt
@@ -75,7 +75,7 @@
                                         tal:condition="day_event"
                                         tal:attributes="class python:is_today and 'todayevent' or 'event'"
                                        ><span tal:attributes="class day/eventclass"><strong><a href=""
-                                           tal:attributes="href string:${view/agenda_url}?year=${year}&month=${view/month}#d${day/date_string};
+                                           tal:attributes="href string:${view/agenda_url}?navyear=${year}&navmonth=${view/month}#d${day/date_string};
                                                            title day/eventstring;"
                                            tal:content="daynumber">
                                            31