diff --git a/trytond/ir/ui/form.rnc b/trytond/ir/ui/form.rnc
index 50edba2b8b..7fa3f46a81 100644
--- a/trytond/ir/ui/form.rnc
+++ b/trytond/ir/ui/form.rnc
@@ -181,6 +181,7 @@ page =
      | separator
      | newline
      | button
+     | link
      | notebook
      | group
      | hpaned
diff --git a/trytond/ir/ui/form.rng b/trytond/ir/ui/form.rng
index 95566a258d..71d9ca490e 100644
--- a/trytond/ir/ui/form.rng
+++ b/trytond/ir/ui/form.rng
@@ -948,6 +948,7 @@
           <ref name="separator"/>
           <ref name="newline"/>
           <ref name="button"/>
+          <ref name="link"/>
           <ref name="notebook"/>
           <ref name="group"/>
           <ref name="hpaned"/>