diff --git a/doc/en/Gtk/TreeModelFilter.xml b/doc/en/Gtk/TreeModelFilter.xml
index 6579f47a6..9c8e87b1b 100644
--- a/doc/en/Gtk/TreeModelFilter.xml
+++ b/doc/en/Gtk/TreeModelFilter.xml
@@ -44,19 +44,18 @@
       </Docs>
     </Member>
     <Member MemberName="ConvertChildIterToIter">
-      <MemberSignature Language="C#" Value="public void ConvertChildIterToIter (Gtk.TreeIter filter_iter, Gtk.TreeIter child_iter);" />
+      <MemberSignature Language="C#" Value="public Gtk.TreeIter ConvertChildIterToIter (Gtk.TreeIter child_iter);" />
       <MemberType>Method</MemberType>
       <ReturnValue>
-        <ReturnType>System.Void</ReturnType>
+        <ReturnType>Gtk.TreeIter</ReturnType>
       </ReturnValue>
       <Parameters>
-        <Parameter Name="filter_iter" Type="Gtk.TreeIter" />
         <Parameter Name="child_iter" Type="Gtk.TreeIter" />
       </Parameters>
       <Docs>
         <summary>To be added</summary>
-        <param name="filter_iter">a <see cref="T:Gtk.TreeIter" /></param>
         <param name="child_iter">a <see cref="T:Gtk.TreeIter" /></param>
+        <returns>a <see cref="T:Gtk.TreeIter" /></returns>
         <remarks>To be added</remarks>
       </Docs>
     </Member>
@@ -108,19 +107,18 @@
       </Docs>
     </Member>
     <Member MemberName="ConvertIterToChildIter">
-      <MemberSignature Language="C#" Value="public void ConvertIterToChildIter (Gtk.TreeIter child_iter, Gtk.TreeIter filter_iter);" />
+      <MemberSignature Language="C#" Value="public Gtk.TreeIter ConvertIterToChildIter (Gtk.TreeIter filter_iter);" />
       <MemberType>Method</MemberType>
       <ReturnValue>
-        <ReturnType>System.Void</ReturnType>
+        <ReturnType>Gtk.TreeIter</ReturnType>
       </ReturnValue>
       <Parameters>
-        <Parameter Name="child_iter" Type="Gtk.TreeIter" />
         <Parameter Name="filter_iter" Type="Gtk.TreeIter" />
       </Parameters>
       <Docs>
         <summary>To be added</summary>
-        <param name="child_iter">a <see cref="T:Gtk.TreeIter" /></param>
         <param name="filter_iter">a <see cref="T:Gtk.TreeIter" /></param>
+        <returns>a <see cref="T:Gtk.TreeIter" /></returns>
         <remarks>To be added</remarks>
       </Docs>
     </Member>