diff --git a/docs/schemas/domain.rng b/docs/schemas/domain.rng
index 21c4380492f389c58a13f82a5067a8b4c7802307..30f673f3add9d095d6ff0f047ae240764d7c18c4 100644
--- a/docs/schemas/domain.rng
+++ b/docs/schemas/domain.rng
@@ -64,6 +64,9 @@
       <element name="label">
         <text/>
       </element>
+      <element name="imagelabel">
+        <text/>
+      </element>
     </element>
   </define>
   <define name="hvs">