diff --git a/category.xml b/category.xml
index 70b4b6c1fd..52ba8a1df5 100644
--- a/category.xml
+++ b/category.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0"?>
-<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of this repository contains the full copyright notices and license terms. -->
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
 <tryton>
     <data>
         <record model="ir.ui.view" id="category_view_tree">
@@ -41,7 +42,7 @@
                     <label name="complete_name"/>
                     <field name="complete_name" colspan="3"/>
                     <notebook colspan="4">
-                        <page string="Childs" col="1">
+                        <page string="Childs" col="1" id="childs">
                             <field name="childs"/>
                         </page>
                     </notebook>
diff --git a/product.xml b/product.xml
index 8cfa1253b1..996193b16f 100644
--- a/product.xml
+++ b/product.xml
@@ -43,7 +43,7 @@ this repository contains the full copyright notices and license terms. -->
                       <label name="active"/>
                       <field name="active" xexpand="0" width="100"/>
                       <notebook colspan="4">
-                          <page string="General">
+                          <page string="General" id="general">
                               <label name="type"/>
                               <field name="type"/>
                               <newline/>
@@ -90,13 +90,13 @@ this repository contains the full copyright notices and license terms. -->
                 <![CDATA[
                 <data>
                     <xpath
-                        expr="/form/notebook/page[@string=&quot;General&quot;]/label[@name=&quot;type&quot;]"
+                        expr="/form/notebook/page[@id=&quot;general&quot;]/label[@name=&quot;type&quot;]"
                         position="before">
                         <label name="code"/>
                         <field name="code"/>
                     </xpath>
                     <xpath
-                        expr="/form/notebook/page[@string=&quot;General&quot;]"
+                        expr="/form/notebook/page[@id=&quot;general&quot;]"
                         position="inside">
                         <separator name="description" colspan="4"/>
                         <field name="description" colspan="4"/>