diff --git a/tryton/modules/account_invoice/invoice.py b/tryton/modules/account_invoice/invoice.py
--- a/tryton/modules/account_invoice/invoice.py
+++ b/tryton/modules/account_invoice/invoice.py
@@ -514,11 +514,14 @@ class Invoice(Workflow, ModelSQL, ModelView, TaxableMixin):
         Journal = pool.get('account.journal')
         if self.state != 'draft':
             return self.journal
+        journal_type = {
+            'out': 'revenue',
+            'in': 'expense',
+            }.get(self.type)
+        if self.journal and self.journal.type == journal_type:
+            return self.journal
         pattern = pattern.copy() if pattern is not None else {}
-        pattern.setdefault('type', {
-                'out': 'revenue',
-                'in': 'expense',
-                }.get(self.type))
+        pattern.setdefault('type', journal_type)
         return Journal.find(pattern)
 
     @classmethod