diff --git a/src/os/wait_wait6.go b/src/os/wait_wait6.go
index 895f21069af2a1..60b304611911a4 100644
--- a/src/os/wait_wait6.go
+++ b/src/os/wait_wait6.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build freebsd
-// +build freebsd
+//go:build dragonfly || freebsd
+// +build dragonfly freebsd
 
 package os
 
diff --git a/src/syscall/zerrors_dragonfly_amd64.go b/src/syscall/zerrors_dragonfly_amd64.go
index 8ed611b3e4f2fa..35e2a52d253b6d 100644
--- a/src/syscall/zerrors_dragonfly_amd64.go
+++ b/src/syscall/zerrors_dragonfly_amd64.go
@@ -1239,8 +1239,10 @@ const (
 	VWERASE                           = 0x4
 	WCONTINUED                        = 0x4
 	WCOREFLAG                         = 0x80
+	WEXITED                           = 0x10
 	WLINUXCLONE                       = 0x80000000
 	WNOHANG                           = 0x1
+	WNOWAIT                           = 0x8
 	WSTOPPED                          = 0x7f
 	WUNTRACED                         = 0x2
 )
diff --git a/src/syscall/zsysnum_dragonfly_amd64.go b/src/syscall/zsysnum_dragonfly_amd64.go
index ae504a5f0c2658..e8996db0f8dd58 100644
--- a/src/syscall/zsysnum_dragonfly_amd64.go
+++ b/src/syscall/zsysnum_dragonfly_amd64.go
@@ -305,4 +305,5 @@ const (
 	SYS_PIPE2                  = 538 // { int pipe2(int *fildes, int flags); }
 	SYS_UTIMENSAT              = 539 // { int utimensat(int fd, const char *path, const struct timespec *ts, int flags); }
 	SYS_ACCEPT4                = 541 // { int accept4(int s, caddr_t name, int *anamelen, int flags); }
+	SYS_WAIT6                  = 548 // { int wait6(idtype_t idtype, id_t id, int *status, int options, struct __wrusage *wrusage, siginfo_t *info); }
 )