diff --git a/addons/mrp/mrp.py b/addons/mrp/mrp.py
index e87962e9ab6..3d19e5ec744 100644
--- a/addons/mrp/mrp.py
+++ b/addons/mrp/mrp.py
@@ -1003,7 +1003,7 @@ class mrp_procurement(osv.osv):
         self.write(cr, uid, ids, {'state':'confirmed','message':''})
         return True
 
-    def action_move_assigned(self, cr, uid, ids):
+    def action_move_assigned(self, cr, uid, ids, context={}):
         self.write(cr, uid, ids, {'state':'running','message':_('from stock: products assigned.')})
         return True