diff --git a/ryu/tests/unit/ofproto/json/of13/4-10-ofp_hello.packet.json b/ryu/tests/unit/ofproto/json/of13/4-10-ofp_hello.packet.json
index 182beecc..d03ff84b 100644
--- a/ryu/tests/unit/ofproto/json/of13/4-10-ofp_hello.packet.json
+++ b/ryu/tests/unit/ofproto/json/of13/4-10-ofp_hello.packet.json
@@ -3,6 +3,8 @@
       "elements": [
          {
             "OFPHelloElemVersionBitmap": {
+               "length": 8, 
+               "type": 1, 
                "versions": [
                   1, 
                   2,