diff --git a/vendor/golang.org/x/sys/unix/zerrors_dragonfly_amd64.go b/vendor/golang.org/x/sys/unix/zerrors_dragonfly_amd64.go
index bbe6089..6130471 100644
--- a/vendor/golang.org/x/sys/unix/zerrors_dragonfly_amd64.go
+++ b/vendor/golang.org/x/sys/unix/zerrors_dragonfly_amd64.go
@@ -938,6 +938,7 @@
 	NET_RT_FLAGS                      = 0x2
 	NET_RT_IFLIST                     = 0x3
 	NET_RT_MAXID                      = 0x4
+	NFDBITS                           = 0x40
 	NOFLSH                            = 0x80000000
 	NOKERNINFO                        = 0x2000000
 	NOTE_ATTRIB                       = 0x8