diff --git a/addons/account/account_bank_statement.py b/addons/account/account_bank_statement.py
index 91d8efc72ce..8ab1c6d7ac9 100644
--- a/addons/account/account_bank_statement.py
+++ b/addons/account/account_bank_statement.py
@@ -644,7 +644,7 @@ class account_bank_statement_line(osv.osv):
                 account_id = part.property_account_receivable.id
             res['value']['account_id'] = account_id
 
-        if account_id and (not line or (line and not line[0].amount)):
+        if account_id and (not line or (line and not line[0].amount)) and not context.get('amount', False):
             company_currency_id = res_users_obj.browse(cursor, user, user,
                     context=context).company_id.currency_id.id
             if not currency_id:
diff --git a/addons/account/account_view.xml b/addons/account/account_view.xml
index 47b675386f6..6643370f0c4 100644
--- a/addons/account/account_view.xml
+++ b/addons/account/account_view.xml
@@ -538,7 +538,7 @@
                                     <field name="date"/>
                                     <field name="name"/>
                                     <field name="type"/>
-                                    <field name="partner_id" on_change="onchange_partner_id(partner_id, type, parent.currency)"/>
+                                    <field name="partner_id" on_change="onchange_partner_id(partner_id, type, parent.currency, {'amount': amount})"/>
                                     <field domain="[('journal_id', '=', parent.journal_id), ('type', '&lt;&gt;', 'view')]" name="account_id"/>
                                     <field name="analytic_account_id" groups="base.group_extended" />
                                     <field name="amount"/>