diff --git a/bank_transaction_period_fix/model/account_bank_statement_line.py b/bank_transaction_period_fix/model/account_bank_statement_line.py
index efaa300d..7d1aff20 100644
--- a/bank_transaction_period_fix/model/account_bank_statement_line.py
+++ b/bank_transaction_period_fix/model/account_bank_statement_line.py
@@ -29,7 +29,7 @@ class AccountBankStatementLine(orm.Model):
     def process_reconciliation(
             self, cr, uid, id, mv_line_dicts, context=None):
         """Put marker in context to use period from date in move line."""
-        ctx = context.copy() or {}
+        ctx = context and context.copy() or {}
         ctx['override_period_from_date'] = True
         return super(AccountBankStatementLine, self).process_reconciliation(
             cr, uid, id, mv_line_dicts, context=ctx)
diff --git a/bank_transaction_period_fix/model/account_move_line.py b/bank_transaction_period_fix/model/account_move_line.py
index 3245d9b1..70a38971 100644
--- a/bank_transaction_period_fix/model/account_move_line.py
+++ b/bank_transaction_period_fix/model/account_move_line.py
@@ -28,7 +28,7 @@ class AccountMoveLine(orm.Model):
 
     def create(self, cr, uid, vals, context=None, check=True):
         """If requested, override period from date."""
-        ctx = context.copy() or {}
+        ctx = context and context.copy() or {}
         if (('override_period_from_date' in ctx or
                'period_id' not in vals) and 'date' in vals):
             period_model = self.pool['account.period']