diff --git a/ryu/ofproto/ofproto_v1_3.py b/ryu/ofproto/ofproto_v1_3.py
index 496d58fc..e0fe76fb 100644
--- a/ryu/ofproto/ofproto_v1_3.py
+++ b/ryu/ofproto/ofproto_v1_3.py
@@ -973,6 +973,32 @@ OFP_EXPERIMENTER_HEADER_SIZE = 16
 assert (calcsize(OFP_EXPERIMENTER_HEADER_PACK_STR) + OFP_HEADER_SIZE
         == OFP_EXPERIMENTER_HEADER_SIZE)
 
+# exp_type values for OFPET_EXPERIMENTER (experimenter=ONF_EXPERIMENTER_ID)
+ONFERR_ET_UNKNOWN = 2300
+ONFERR_ET_EPERM = 2301
+ONFERR_ET_BAD_ID = 2302
+ONFERR_ET_BUNDLE_EXIST = 2303
+ONFERR_ET_BUNDLE_CLOSED = 2304
+ONFERR_ET_OUT_OF_BUNDLES = 2305
+ONFERR_ET_BAD_TYPE = 2306
+ONFERR_ET_BAD_FLAGS = 2307
+ONFERR_ET_MSG_BAD_LEN = 2308
+ONFERR_ET_MSG_BAD_XID = 2309
+ONFERR_ET_MSG_UNSUP = 2310
+ONFERR_ET_MSG_CONFLICT = 2311
+ONFERR_ET_MSG_TOO_MANY = 2312
+ONFERR_ET_FAILED = 2313
+ONFERR_ET_TIMEOUT = 2314
+ONFERR_ET_BUNDLE_IN_PROGRESS = 2315
+ONFERR_ET_CANT_SYNC = 2320
+ONFERR_ET_BAD_PRIORITY = 2360
+ONFERR_ET_ASYNC_INVALUD = 2370
+ONFERR_ET_ASYNC_UNSUPPORTED = 2371
+ONFERR_ET_ASYNC_EPERM = 2372
+ONFERR_DUP_INSTRUCTION = 2600  # the lack of _ET_ is per spec
+ONFERR_ET_MPART_REQUEST_TIMEOUT = 2640
+ONFERR_ET_MPART_REPLY_TIMEOUT = 2641
+
 # struct ofp_hello
 OFP_HELLO_HEADER_SIZE = 8