diff --git a/doc/en/Gtk/TreeStore.xml b/doc/en/Gtk/TreeStore.xml
index 309f9db18..60fb564b3 100644
--- a/doc/en/Gtk/TreeStore.xml
+++ b/doc/en/Gtk/TreeStore.xml
@@ -802,7 +802,13 @@
         <param name="iter">an object of type <see cref="T:Gtk.TreeIter" /></param>
         <param name="path_string">an object of type <see cref="T:System.String" /></param>
         <returns>an object of type <see cref="T:System.Boolean" /></returns>
-        <remarks>Otherwise, <paramref name="iter" /> is left invalid and <see langword="false" /> is returned.</remarks>
+        <remarks>Otherwise, <paramref name="iter" /> is left invalid and <see langword="false" /> is returned.
+
+<para>
+path_string "0" represent the first node, "1" the second, and so on.
+path_string "0:0" represent the first child of the first node, "0:1" the second child of the first node, and so on.
+
+</para></remarks>
       </Docs>
     </Member>
     <Member MemberName="IterChildren">