diff --git a/src/freedreno/registers/rules-ng.xsd b/src/freedreno/registers/rules-ng.xsd
index 9087a2f9f06..4e3651d6f32 100644
--- a/src/freedreno/registers/rules-ng.xsd
+++ b/src/freedreno/registers/rules-ng.xsd
@@ -235,6 +235,7 @@
 		<attribute name="type" type="NMTOKENS" use="optional" />
 		<attribute name="varset" type="NMTOKEN" use="optional" />
 		<attribute name="variants" type="string" use="optional" />
+		<attribute name="addvariant" type="rng:Boolean" use="optional" />
 		<attribute name="shr" type="nonNegativeInteger" use="optional" />
 	</complexType>