diff --git a/modules/purchase_trade/purchase.py b/modules/purchase_trade/purchase.py
index 7395d1b..49f38c7 100755
--- a/modules/purchase_trade/purchase.py
+++ b/modules/purchase_trade/purchase.py
@@ -464,14 +464,17 @@ class Purchase(metaclass=PoolMeta):
         self.our_bank_account = self._get_default_our_bank_account()
 
     @classmethod
-    def default_currency(cls):
-        if is_itsa_company():
+    def default_currency(cls, **pattern):
+        company = pattern.get('company')
+        if company and not hasattr(company, 'party'):
+            company = Pool().get('company.company')(company)
+        if is_itsa_company(company):
             currency = default_itsa_currency()
             if currency:
                 return currency
         default = getattr(super(), 'default_currency', None)
         if default:
-            return default()
+            return default(**pattern)
 
     @classmethod
     def default_wb(cls):
diff --git a/modules/purchase_trade/sale.py b/modules/purchase_trade/sale.py
index 06ef5e7..9ab4cd8 100755
--- a/modules/purchase_trade/sale.py
+++ b/modules/purchase_trade/sale.py
@@ -408,14 +408,17 @@ class Sale(metaclass=PoolMeta):
         self.our_bank_account = self._get_default_our_bank_account()
 
     @classmethod
-    def default_currency(cls):
-        if is_itsa_company():
+    def default_currency(cls, **pattern):
+        company = pattern.get('company')
+        if company and not hasattr(company, 'party'):
+            company = Pool().get('company.company')(company)
+        if is_itsa_company(company):
             currency = default_itsa_currency()
             if currency:
                 return currency
         default = getattr(super(), 'default_currency', None)
         if default:
-            return default()
+            return default(**pattern)
     
     @classmethod
     def default_wb(cls):