diff --git a/addons/account/account_move_line.py b/addons/account/account_move_line.py
index 17120ee265e..c6182d9e61b 100644
--- a/addons/account/account_move_line.py
+++ b/addons/account/account_move_line.py
@@ -827,7 +827,12 @@ class account_move_line(osv.osv):
         if r[0][1] != None:
             raise osv.except_osv(_('Error'), _('Some entries are already reconciled !'))
 
-        if (not currency_obj.is_zero(cr, uid, account.company_id.currency_id, writeoff)) or \
+        if context.get('fy_closing'):
+            # We don't want to generate any write-off when being called from the
+            # wizard used to close a fiscal year (and it doesn't give us any
+            # writeoff_acc_id).
+            pass
+        elif (not currency_obj.is_zero(cr, uid, account.company_id.currency_id, writeoff)) or \
            (account.currency_id and (not currency_obj.is_zero(cr, uid, account.currency_id, currency))):
             if not writeoff_acc_id:
                 raise osv.except_osv(_('Warning'), _('You have to provide an account for the write off/exchange difference entry !'))