diff --git a/ryu/ofproto/ofproto_v1_3_parser.py b/ryu/ofproto/ofproto_v1_3_parser.py
index a18eccc8..32ea4cc7 100644
--- a/ryu/ofproto/ofproto_v1_3_parser.py
+++ b/ryu/ofproto/ofproto_v1_3_parser.py
@@ -21,6 +21,7 @@ from ryu.lib import addrconv
 from ryu.lib import mac
 from ryu import utils
 from ofproto_parser import StringifyMixin, MsgBase, msg_pack_into, msg_str_attr
+from . import ether
 from . import ofproto_parser
 from . import ofproto_common
 from . import ofproto_v1_3
@@ -2852,10 +2853,10 @@ class OFPActionPushVlan(OFPAction):
     ================ ======================================================
     Attribute        Description
     ================ ======================================================
-    ethertype        Ether type
+    ethertype        Ether type.  The default is 802.1Q. (0x8100)
     ================ ======================================================
     """
-    def __init__(self, ethertype, type_=None, len_=None):
+    def __init__(self, ethertype=ether.ETH_TYPE_8021Q, type_=None, len_=None):
         super(OFPActionPushVlan, self).__init__()
         self.ethertype = ethertype