diff --git a/openerp/addons/base/rng/view.rng b/openerp/addons/base/rng/view.rng
index d996dfd971f..4b13378d10a 100644
--- a/openerp/addons/base/rng/view.rng
+++ b/openerp/addons/base/rng/view.rng
@@ -178,6 +178,7 @@
             <rng:optional><rng:attribute name="string"/></rng:optional>
             <rng:optional><rng:attribute name="type"/></rng:optional>
             <rng:optional><rng:attribute name="link"/></rng:optional>
+            <rng:optional><rng:attribute name="version"/></rng:optional>
             <rng:ref name="container"/>
         </rng:element>
     </rng:define>