diff --git a/bin/addons/base/rng/view.rng b/bin/addons/base/rng/view.rng
index 8774d73c16d..2f3c07b60bc 100644
--- a/bin/addons/base/rng/view.rng
+++ b/bin/addons/base/rng/view.rng
@@ -303,6 +303,7 @@
             <rng:optional><rng:attribute name="day_length" /></rng:optional>
             <rng:optional><rng:attribute name="date_delay" /></rng:optional>
             <rng:optional><rng:attribute name="type" /></rng:optional>
+            <rng:optional><rng:attribute name="mode" /></rng:optional>
             <rng:oneOrMore>
                 <rng:ref name="field"/>
             </rng:oneOrMore>