diff --git a/docs/schemas/storagevol.rng b/docs/schemas/storagevol.rng
index 7450547ffa..96d6b3e6d0 100644
--- a/docs/schemas/storagevol.rng
+++ b/docs/schemas/storagevol.rng
@@ -56,6 +56,11 @@
           <ref name='scaledInteger'/>
         </element>
       </optional>
+      <optional>
+        <element name='physical'>
+          <ref name='scaledInteger'/>
+        </element>
+      </optional>
     </interleave>
   </define>
 
diff --git a/tests/storagevolschemadata/qcow2-no-source.xml b/tests/storagevolschemadata/qcow2-no-source.xml
index 777294ec14..4958845594 100644
--- a/tests/storagevolschemadata/qcow2-no-source.xml
+++ b/tests/storagevolschemadata/qcow2-no-source.xml
@@ -3,6 +3,7 @@
   <key>/var/lib/libvirt/images/OtherDemo.img</key>
   <capacity unit="G">5</capacity>
   <allocation>294912</allocation>
+  <physical unit="G">5</physical>
   <target>
     <path>/var/lib/libvirt/images/OtherDemo.img</path>
     <format type='qcow2'/>