diff --git a/tabellio/agenda/event.py b/tabellio/agenda/event.py
index 78fe740..4cd1c52 100644
--- a/tabellio/agenda/event.py
+++ b/tabellio/agenda/event.py
@@ -10,6 +10,7 @@ from Products.CMFCore.utils import getToolByName
 from zope.i18n.locales import locales
 from plone.directives import form, dexterity
 from plone.dexterity.content import Item
+from plone.app.textfield import RichText
 
 from tabellio.agenda.interfaces import MessageFactory as _
 
@@ -25,6 +26,7 @@ class IBaseEvent(form.Schema):
     start = schema.Datetime(title=_(u'Start'))
     end = schema.Datetime(title=_(u'End'), required=False)
 
+    text = RichText(title=_(u'Text'), required=False)
 
 
 class IEvent(IBaseEvent):