diff --git a/doc/en/GLib/Object.xml b/doc/en/GLib/Object.xml
index 8a852e2b1..56c57e39c 100644
--- a/doc/en/GLib/Object.xml
+++ b/doc/en/GLib/Object.xml
@@ -465,5 +465,17 @@ This method is called by the generated classes by the Gtk# framework.
         <remarks>This disconnects from generic property change notifications. (This only affects notifications created with the corresponding generic version of <see cref="M:GLib.Object.AddNotification" />. It does not remove notifications for specific properties.)</remarks>
       </Docs>
     </Member>
+    <Member MemberName="PersistentData">
+      <MemberSignature Language="C#" Value="protected System.Collections.Hashtable PersistentData { get; };" />
+      <MemberType>Property</MemberType>
+      <ReturnValue>
+        <ReturnType>System.Collections.Hashtable</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>Data hash to persistently store managed objects.</summary>
+        <returns>a <see cref="T:System.Collections.Hashtable" /></returns>
+        <remarks>This data hash is persistent until the native object is destroyed and can therefore outlast a GLib.Object wrapper class.</remarks>
+      </Docs>
+    </Member>
   </Members>
-</Type>
\ No newline at end of file
+</Type>