diff --git a/bin/import_xml.rng b/bin/import_xml.rng
index 91b3a9554e5..d1aa67fcb5b 100644
--- a/bin/import_xml.rng
+++ b/bin/import_xml.rng
@@ -116,6 +116,7 @@
             <rng:optional><rng:attribute name="type"/></rng:optional>
             <rng:optional><rng:attribute name="ref"/></rng:optional>
             <rng:optional><rng:attribute name="eval"/></rng:optional>
+            <rng:optional><rng:attribute name="domain"/></rng:optional>
             <rng:optional><rng:attribute name="search"/></rng:optional>
             <rng:optional><rng:attribute name="model"/></rng:optional>
             <rng:optional><rng:attribute name="use"/></rng:optional>