diff --git a/openerp/import_xml.rng b/openerp/import_xml.rng
index c055009a35d..716a525b496 100644
--- a/openerp/import_xml.rng
+++ b/openerp/import_xml.rng
@@ -178,7 +178,7 @@
                 </rng:group>
                 <rng:group>
                     <rng:attribute name="search"/>
-                    <rng:attribute name="model"/>
+                    <rng:optional><rng:attribute name="model"/></rng:optional>
                     <rng:optional><rng:attribute name="use"/></rng:optional>
                     <rng:empty/>
                 </rng:group>