diff --git a/docs/schemas/cputypes.rng b/docs/schemas/cputypes.rng
index 88f6904343..aea6ff0267 100644
--- a/docs/schemas/cputypes.rng
+++ b/docs/schemas/cputypes.rng
@@ -336,17 +336,19 @@
             </attribute>
           </element>
         </optional>
-        <element name="topology">
-          <attribute name="sockets">
-            <ref name="positiveInteger"/>
-          </attribute>
-          <attribute name="cores">
-            <ref name="positiveInteger"/>
-          </attribute>
-          <attribute name="threads">
-            <ref name="positiveInteger"/>
-          </attribute>
-        </element>
+        <optional>
+          <element name="topology">
+            <attribute name="sockets">
+              <ref name="positiveInteger"/>
+            </attribute>
+            <attribute name="cores">
+              <ref name="positiveInteger"/>
+            </attribute>
+            <attribute name="threads">
+              <ref name="positiveInteger"/>
+            </attribute>
+          </element>
+        </optional>
         <zeroOrMore>
           <element name="feature">
             <attribute name="name">