diff --git a/addons/account/models/company.py b/addons/account/models/company.py
index 4535f0da68d..40128bb2f4a 100644
--- a/addons/account/models/company.py
+++ b/addons/account/models/company.py
@@ -227,6 +227,7 @@ class ResCompany(models.Model):
 
     def _validate_fiscalyear_lock(self, values):
         if values.get('fiscalyear_lock_date'):
+
             nb_draft_entries = self.env['account.move'].search([
                 ('company_id', 'in', self.ids),
                 ('state', '=', 'draft'),
@@ -234,6 +235,15 @@ class ResCompany(models.Model):
             if nb_draft_entries:
                 raise ValidationError(_('There are still unposted entries in the period you want to lock. You should either post or delete them.'))
 
+            has_unreconciled_statement_lines = self.env['account.bank.statement.line'].search_count([
+                ('company_id', 'in', self.ids),
+                ('is_reconciled', '=', False),
+            ])
+            if has_unreconciled_statement_lines:
+                raise ValidationError(_(
+                    "There are still unreconciled bank statement lines in the period you want to lock."
+                    "You should either reconcile or delete them."))
+
     def _get_user_fiscal_lock_date(self):
         """Get the fiscal lock date for this company depending on the user"""
         self.ensure_one()
diff --git a/addons/account/tests/test_account_move_entry.py b/addons/account/tests/test_account_move_entry.py
index c4198a1eecb..aba886a1929 100644
--- a/addons/account/tests/test_account_move_entry.py
+++ b/addons/account/tests/test_account_move_entry.py
@@ -142,6 +142,23 @@ class TestAccountMove(AccountTestInvoicingCommon):
         # The date has been changed to the first valid date.
         self.assertEqual(copy_move.date, copy_move.company_id.fiscalyear_lock_date + relativedelta(days=1))
 
+    def test_misc_fiscalyear_lock_date_2(self):
+        self.test_move.post()
+
+        # Create a bank statement to get a balance in the suspense account.
+        statement = self.env['account.bank.statement'].create({
+            'journal_id': self.company_data['default_journal_bank'].id,
+            'date': '2016-01-01',
+            'line_ids': [
+                (0, 0, {'payment_ref': 'test', 'amount': 10.0})
+            ],
+        })
+        statement.button_post()
+
+        # You can't lock the fiscal year if there is some unreconciled statement.
+        with self.assertRaises(ValidationError), self.cr.savepoint():
+            self.test_move.company_id.fiscalyear_lock_date = fields.Date.from_string('2017-01-01')
+
     def test_misc_tax_lock_date_1(self):
         self.test_move.post()