diff --git a/dba/davical.sql b/dba/davical.sql
index fdc8733e..00b065c6 100644
--- a/dba/davical.sql
+++ b/dba/davical.sql
@@ -389,6 +389,7 @@ CREATE TABLE calendar_attendee (
   rsvp BOOLEAN,
   property TEXT, -- The full text of the property
   attendee_state TEXT, -- Internal DAViCal processing state
+  weak_etag TEXT, -- The week_etag applying for this attendee state
   PRIMARY KEY ( dav_id, attendee )
 );
 
diff --git a/dba/patches/1.2.9.sql b/dba/patches/1.2.9.sql
index 3a3ce04e..f744a32a 100644
--- a/dba/patches/1.2.9.sql
+++ b/dba/patches/1.2.9.sql
@@ -31,6 +31,7 @@ ALTER TABLE calendar_alarm ADD COLUMN trigger_state CHAR DEFAULT 'N';
 
 -- Internal DAViCal calendar state
 ALTER TABLE calendar_attendee ADD COLUMN attendee_state TEXT;
+ALTER TABLE calendar_attendee ADD COLUMN weak_etag TEXT;
 
 SELECT new_db_revision(1,2,9, 'Septembre' );