diff --git a/addons/purchase/purchase.py b/addons/purchase/purchase.py
index 14a45f8f36e..9524abf06f7 100644
--- a/addons/purchase/purchase.py
+++ b/addons/purchase/purchase.py
@@ -189,7 +189,7 @@ class purchase_order(osv.osv):
 					if not a:
 						a = ol.product_id.categ_id.property_account_expense_categ
 					if not a:
-						raise osv.except_osv('Error !', 'There is no income account define for this product: "%s" (id:%d)' % (line.product_id.name, line.product_id.id,))
+						raise osv.except_osv('Error !', 'There is no income account defined for this product: "%s" (id:%d)' % (line.product_id.name, line.product_id.id,))
 					a = a[0]
 				else:
 					a = self.pool.get('ir.property').get(cr, uid, 'property_account_expense_categ', 'product.category')
diff --git a/addons/sale/sale.py b/addons/sale/sale.py
index cf972a7ad01..a8d8aa6bef0 100644
--- a/addons/sale/sale.py
+++ b/addons/sale/sale.py
@@ -576,7 +576,7 @@ class sale_order_line(osv.osv):
 					if not a:
 						a = line.product_id.categ_id.property_account_income_categ
 					if not a:
-						raise osv.except_osv('Error !', 'There is no income account define for this product: "%s" (id:%d)' % (line.product_id.name, line.product_id.id,))
+						raise osv.except_osv('Error !', 'There is no income account defined for this product: "%s" (id:%d)' % (line.product_id.name, line.product_id.id,))
 					a = a[0]
 				else:
 					a = self.pool.get('ir.property').get(cr, uid, 'property_account_income_categ', 'product.category', context=context)