diff --git a/ryu/ofproto/ofproto_common.py b/ryu/ofproto/ofproto_common.py
index ca351c5e..0d64b54f 100644
--- a/ryu/ofproto/ofproto_common.py
+++ b/ryu/ofproto/ofproto_common.py
@@ -27,6 +27,7 @@ OFP_TCP_PORT = 6633
 OFP_SSL_PORT = 6633
 
 # Vendor/Experimenter IDs
-NX_EXPERIMENTER_ID = 0x00002300  # Nicira
+# https://rs.opennetworking.org/wiki/display/PUBLIC/ONF+Registry
+NX_EXPERIMENTER_ID = 0x00002320  # Nicira
 BSN_EXPERIMENTER_ID = 0x005c16c7  # Big Switch Networks
 ONF_EXPERIMENTER_ID = 0x4f4e4600  # OpenFlow Extensions for 1.3.X Pack 1