diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 8d126065e3335afaa5a7e1b4ec0ebb793d9cea95..4804c692e2107ced6887ae6d6c94ec3f0c8c07c3 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -5218,9 +5218,7 @@
   </define>
   <!-- Memory as an attribute is in KiB, no way to express a unit -->
   <define name="memoryKB">
-    <data type="unsignedInt">
-      <param name="pattern">[0-9]+</param>
-    </data>
+    <data type="unsignedLong"/>
   </define>
   <define name="domainName">
     <data type="string">