diff --git a/bin/addons/base/rng/view.rng b/bin/addons/base/rng/view.rng
index 9ee1f1b213d..d3c533ab0bf 100644
--- a/bin/addons/base/rng/view.rng
+++ b/bin/addons/base/rng/view.rng
@@ -86,7 +86,7 @@
             <rng:zeroOrMore>
                 <rng:choice>
                     <rng:ref name="field"/>
-		    		<rng:ref name="shortcut"/>
+                    <rng:ref name="shortcut"/>
                     <rng:ref name="separator"/>
                     <rng:ref name="tree"/>
                     <rng:ref name="group"/>
@@ -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" />