diff --git a/addons/account_asset/account_asset.py b/addons/account_asset/account_asset.py
index 4220fe0df1e..96c5cc39aa9 100644
--- a/addons/account_asset/account_asset.py
+++ b/addons/account_asset/account_asset.py
@@ -37,6 +37,8 @@ class account_asset_category(osv.osv):
         'account_expense_depreciation_id': fields.many2one('account.account', 'Depr. Expense Account', required=True),
         'journal_id': fields.many2one('account.journal', 'Journal', required=True),
         'company_id': fields.many2one('res.company', 'Company', required=True),
+        'method': fields.selection([('linear','Linear'),('progressif','Progressive')], 'Computation method', required=True),
+        'method_delay': fields.integer('During (interval)'),
     }
 
     _defaults = {
@@ -198,7 +200,13 @@ class account_asset_asset(osv.osv):
         'company_id': lambda self, cr, uid, context: self.pool.get('res.company')._company_default_get(cr, uid, 'account.asset.asset',context=context),
     }
 
-
+    def onchange_category_id(self, cr, uid, ids, category_id, context=None):
+        res = {'value':{}}
+        if category_id:
+            category_obj = self.pool.get('account.asset.category').browse(cr, uid, category_id, context=context)
+            res['value'] = {'method': category_obj.method, 'method_delay': category_obj.method_delay}
+        return res
+    
     def _compute_period(self, cr, uid, property, context={}):
         if (len(property.entry_asset_ids or [])/2)>=property.method_delay:
             return False
diff --git a/addons/account_asset/account_asset_view.xml b/addons/account_asset/account_asset_view.xml
index f75b0dc4cf6..cc5232b12c7 100644
--- a/addons/account_asset/account_asset_view.xml
+++ b/addons/account_asset/account_asset_view.xml
@@ -15,6 +15,8 @@
                 <field name="account_asset_id"/>
                 <field name="account_depreciation_id"/>
                 <field name="account_expense_depreciation_id"/>
+                <field name="method"/>
+                <field name="method_delay"/>
         	<group col="4" colspan="4" groups="analytic.group_analytic_accounting">
         	    <separator string="Analytic information" colspan="4" />
         	    <newline/>
@@ -50,7 +52,7 @@
            <form string="Asset">
               <group col="6" colspan="4">
                  <field name="name" select="1"/>
-                 <field name="category_id" select="1"/>
+                 <field name="category_id" select="1" on_change="onchange_category_id(category_id)"/>
                  <field name="code" select="1"/>
                  <field name="purchase_value" select="1"/>
                  <field name="currency_id" select="1"/>