diff --git a/stock_reserve_sale/model/sale.py b/stock_reserve_sale/model/sale.py
index 2720de44b..c8d4c07ce 100644
--- a/stock_reserve_sale/model/sale.py
+++ b/stock_reserve_sale/model/sale.py
@@ -68,6 +68,11 @@ class sale_order(orm.Model):
         return super(sale_order, self).action_button_confirm(
             cr, uid, ids, context=context)
 
+    def action_cancel(self, cr, uid, ids, context=None):
+        self.release_all_stock_reservation(cr, uid, ids, context=context)
+        return super(sale_order, self).action_cancel(
+            cr, uid, ids, context=context)
+
 
 class sale_order_line(orm.Model):
     _inherit = 'sale.order.line'