diff --git a/addons/account/partner.py b/addons/account/partner.py
index 2d57effc4f8..cd1126970ed 100644
--- a/addons/account/partner.py
+++ b/addons/account/partner.py
@@ -79,43 +79,45 @@ class res_partner(osv.osv):
 		'debit_limit': fields.float('Debit Limit'),
 		'credit_limit': fields.float('Credit Limit'),
 		'property_account_payable': fields.property(
-		  'account.account',
-		  type='many2one', 
-		  relation='account.account', 
-		  string="Account Payable", 
-		  method=True,
-		  view_load=True,
-		  group_name="Accounting Properties",
-		  domain="[('type', '=', 'payable')]",
-		  help="This account will be used, instead of the default one, as the payable account for the current partner"),
+			'account.account',
+			type='many2one',
+			relation='account.account',
+			string="Account Payable",
+			method=True,
+			view_load=True,
+			group_name="Accounting Properties",
+			domain="[('type', '=', 'payable')]",
+			help="This account will be used, instead of the default one, as the payable account for the current partner",
+			required=True),
 		'property_account_receivable': fields.property(
-		'account.account',
-		  type='many2one', 
-		  relation='account.account', 
-		  string="Account Receivable", 
-		  method=True,
-		  view_load=True,
-		  group_name="Accounting Properties",
-		  domain="[('type', '=', 'receivable')]",
-		  help="This account will be used, instead of the default one, as the receivable account for the current partner"),
+			'account.account',
+			type='many2one',
+			relation='account.account',
+			string="Account Receivable",
+			method=True,
+			view_load=True,
+			group_name="Accounting Properties",
+			domain="[('type', '=', 'receivable')]",
+			help="This account will be used, instead of the default one, as the receivable account for the current partner",
+			required=True),
 		'property_account_tax': fields.property(
-		  'account.tax',
-		  type='many2one', 
-		  relation='account.tax', 
-		  string="Default Tax", 
-		  method=True,
-		  view_load=True,
-		  group_name="Accounting Properties",
-		  help="This tax will be used, instead of the default one."),
+			'account.tax',
+			type='many2one',
+			relation='account.tax',
+			string="Default Tax",
+			method=True,
+			view_load=True,
+			group_name="Accounting Properties",
+			help="This tax will be used, instead of the default one."),
 		'property_payment_term': fields.property(
-		  'account.payment.term',
-		  type='many2one', 
-		  relation='account.payment.term', 
-		  string ='Payment Term',
-		  method=True,
-		  view_load=True,
-		  group_name="Accounting Properties",
-		  help="This payment term will be used, instead of the default one, for the current partner"),
+			'account.payment.term',
+			type='many2one',
+			relation='account.payment.term',
+			string ='Payment Term',
+			method=True,
+			view_load=True,
+			group_name="Accounting Properties",
+			help="This payment term will be used, instead of the default one, for the current partner"),
 		'ref_companies': fields.one2many('res.company', 'partner_id',
 			'Companies that refers to partner'),
 	}