diff --git a/addons/purchase/models/account_invoice.py b/addons/purchase/models/account_invoice.py
index 103cb20a888..d0c30016944 100644
--- a/addons/purchase/models/account_invoice.py
+++ b/addons/purchase/models/account_invoice.py
@@ -77,18 +77,19 @@ class AccountMove(models.Model):
     @api.onchange('partner_id', 'company_id')
     def _onchange_partner_id(self):
         res = super(AccountMove, self)._onchange_partner_id()
-        if not self.env.context.get('default_journal_id') and self.partner_id and\
+        if self.partner_id and\
                 self.move_type in ['in_invoice', 'in_refund'] and\
                 self.currency_id != self.partner_id.property_purchase_currency_id and\
                 self.partner_id.property_purchase_currency_id.id:
-            journal_domain = [
-                ('type', '=', 'purchase'),
-                ('company_id', '=', self.company_id.id),
-                ('currency_id', '=', self.partner_id.property_purchase_currency_id.id),
-            ]
-            default_journal_id = self.env['account.journal'].search(journal_domain, limit=1)
-            if default_journal_id:
-                self.journal_id = default_journal_id
+            if not self.env.context.get('default_journal_id'):
+                journal_domain = [
+                    ('type', '=', 'purchase'),
+                    ('company_id', '=', self.company_id.id),
+                    ('currency_id', '=', self.partner_id.property_purchase_currency_id.id),
+                ]
+                default_journal_id = self.env['account.journal'].search(journal_domain, limit=1)
+                if default_journal_id:
+                    self.journal_id = default_journal_id
             if self.env.context.get('default_currency_id'):
                 self.currency_id = self.env.context['default_currency_id']
             if self.partner_id.property_purchase_currency_id: