diff --git a/docs/schemas/nodedev.rng b/docs/schemas/nodedev.rng
index 4ad6708b70..e089e66858 100644
--- a/docs/schemas/nodedev.rng
+++ b/docs/schemas/nodedev.rng
@@ -443,7 +443,7 @@
 
     <optional>
       <element name="unique_id">
-        <ref name="positiveInteger"/>
+        <ref name="unsignedInt"/>
       </element>
     </optional>