diff --git a/tabellio/documents/document.py b/tabellio/documents/document.py
index e2c0269..d6e74f5 100644
--- a/tabellio/documents/document.py
+++ b/tabellio/documents/document.py
@@ -25,6 +25,7 @@ class IDocument(form.Schema):
     no = schema.TextLine(title=_('Number'), required=False)
     session = LegisSession(title=_(u'Session'))
     nodoc = schema.TextLine(title=_('Secondary Number'), required=False)
+    noannexe = schema.TextLine(title=_('Appendix Number'), required=False)
     date = schema.Date(title=_(u'Date'))
     authors = RelationList(title=_(u'Authors'), default=[], required=False,
                            value_type=RelationChoice(title=_(u'Author'),