diff --git a/openerp/addons/base/rng/view.rng b/openerp/addons/base/rng/view.rng
index 0f161a91f51..794eade6b89 100644
--- a/openerp/addons/base/rng/view.rng
+++ b/openerp/addons/base/rng/view.rng
@@ -590,6 +590,7 @@
             <rng:optional><rng:attribute name="filters"/></rng:optional>
             <rng:optional><rng:attribute name="statusbar_visible"/></rng:optional>
             <rng:optional><rng:attribute name="statusbar_colors"/></rng:optional>
+            <rng:optional><rng:attribute name="interval" /></rng:optional>
             <!-- Widget *static* options defined as an arbitrary JSON dict, with
                  widget-dependent parameters. To be ignored if widget/client does
                  not support them. -->