diff --git a/addons/caldav/caldav_data.xml b/addons/caldav/caldav_data.xml
index 35ba095fb51..2394c95d272 100644
--- a/addons/caldav/caldav_data.xml
+++ b/addons/caldav/caldav_data.xml
@@ -188,7 +188,7 @@
         </record>
 
         <record model="basic.calendar.attributes" id="field_todo_seq">
-            <field name="name">seq</field>
+            <field name="name">sequence</field>
             <field name="type">vtodo</field>
         </record>
 
@@ -208,7 +208,7 @@
         </record>
 
         <record model="basic.calendar.attributes" id="field_todo_percent">
-            <field name="name">percent</field>
+            <field name="name">percent-complete</field>
             <field name="type">vtodo</field>
         </record>
 
diff --git a/addons/project_caldav/project_caldav_data.xml b/addons/project_caldav/project_caldav_data.xml
index e5e2ce0578d..0a4d36580fc 100644
--- a/addons/project_caldav/project_caldav_data.xml
+++ b/addons/project_caldav/project_caldav_data.xml
@@ -51,12 +51,17 @@
             <field name="fn">field</field>
         </record>
 
+        <!-- Sequence is not impemented right. 
+	    See http://tools.ietf.org/html/rfc5545#section-3.8.7.4
+	    Disabling..
+	
         <record model="basic.calendar.fields" id="map_todo_6">
             <field name="name" ref="caldav.field_todo_seq"/>
             <field name="type_id" ref="caldav.calendar_lines_todo" />
 	        <field name="field_id" search="[('name','=','sequence'),('model_id.model','=','calendar.todo')]" />
             <field name="fn">field</field>
         </record>
+        -->
 
         <record model="basic.calendar.fields" id="map_todo_7">
             <field name="name" ref="caldav.field_todo_url"/>