Add a bit more to the migration guide

diff --git a/docs/reference/gtk/migrating-2to4.xml b/docs/reference/gtk/migrating-2to4.xml
index 6083338d55dec2e1aceeab1ad457f1d895b0d9d5..12e6814d58e84e494dff199c70b0b98f3f39d1f8 100644 (file)
--- a/docs/reference/gtk/migrating-2to4.xml
+++ b/docs/reference/gtk/migrating-2to4.xml
@@ -9,7 +9,7 @@
   <para>
     If your application is still using GTK+ 2, you should first convert it to
     GTK+ 3, by following the <ulink url="https://developer.gnome.org/gtk3/stable/gtk-migrating-2-to-3.html">migration guide</ulink> in the GTK+ 3
-    documentation.
+    documentation, and then follow <xref linkend="gtk-migrating-3-to-4"/>.
   </para>
 
 </chapter>