diff --git a/golem_activity/data/golem_activity_data.xml b/golem_activity/data/golem_activity_data.xml
index b576976..013d07d 100644
--- a/golem_activity/data/golem_activity_data.xml
+++ b/golem_activity/data/golem_activity_data.xml
@@ -19,6 +19,20 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 <openerp>
   <data noupdate="1">
+    <!-- Good default for product categories -->
+    <record id="property_account_expense_categ" model="ir.property">
+      <field name="name">property_account_expense_categ</field>
+      <field name="fields_id" search="[('model','=','product.category'),('name','=','property_account_expense_categ')]"/>
+      <field name="value">account.account,610</field>
+      <field name="company_id" ref="base.main_company"/>
+    </record>
+    <record id="property_account_income_categ" model="ir.property">
+      <field name="name">property_account_income_categ</field>
+      <field name="fields_id" search="[('model','=','product.category'),('name','=','property_account_income_categ')]"/>
+      <field name="value">account.account,854</field>
+      <field name="company_id" ref="base.main_company"/>
+    </record>
+
     <!-- Base data for activities -->
     <record model="product.category" id="golem_product_category_activities">
       <field name="name">Activités</field>
@@ -31,16 +45,28 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
       <field name="name">Bien-Être</field>
       <field name="parent_id"
         eval="ref('golem_activity.golem_product_category_activities')" />
+      <field name="property_account_income_categ"
+        search="[('code', '=', '706000')]" />
+      <field name="property_account_expense_categ"
+        search="[('code', '=', '604000')]" />
     </record>
     <record model="product.category" id="golem_product_category_martial">
       <field name="name">Arts martiaux</field>
       <field name="parent_id"
         eval="ref('golem_activity.golem_product_category_activities')" />
+      <field name="property_account_income_categ"
+        search="[('code', '=', '706000')]" />
+      <field name="property_account_expense_categ"
+        search="[('code', '=', '604000')]" />
     </record>
     <record model="product.category" id="golem_product_category_dance">
       <field name="name">Danse</field>
       <field name="parent_id"
         eval="ref('golem_activity.golem_product_category_activities')" />
+      <field name="property_account_income_categ"
+        search="[('code', '=', '706000')]" />
+      <field name="property_account_expense_categ"
+        search="[('code', '=', '604000')]" />
     </record>
   </data>
 </openerp>