diff --git a/bin/addons/base/rng/view.rng b/bin/addons/base/rng/view.rng
index 1ee851e2ac7..d3c533ab0bf 100644
--- a/bin/addons/base/rng/view.rng
+++ b/bin/addons/base/rng/view.rng
@@ -552,6 +552,7 @@
             <rng:optional><rng:attribute name="context"/></rng:optional>
             <rng:optional><rng:attribute name="help"/></rng:optional>
             <rng:optional><rng:attribute name="domain"/></rng:optional>
+            <rng:optional><rng:attribute name="default"/></rng:optional>
             <rng:zeroOrMore>
                 <rng:choice>
                     <rng:ref name="form" />