diff --git a/unix/syscall_dragonfly.go b/unix/syscall_dragonfly.go
index 474141b6..5af108a5 100644
--- a/unix/syscall_dragonfly.go
+++ b/unix/syscall_dragonfly.go
@@ -105,13 +105,16 @@ func Pipe(p []int) (err error) {
 	return
 }
 
-//sysnb	pipe2(flags int) (r int, w int, err error)
+//sysnb	pipe2(p *[2]_C_int, flags int) (r int, w int, err error)
 
 func Pipe2(p []int, flags int) (err error) {
 	if len(p) != 2 {
 		return EINVAL
 	}
-	p[0], p[1], err = pipe2(flags)
+	var pp [2]_C_int
+	// pipe2 on dragonfly takes an fds array as an argument, but still
+	// returns the file descriptors.
+	p[0], p[1], err = pipe2(&pp, flags)
 	return err
 }
 
diff --git a/unix/zsyscall_dragonfly_amd64.go b/unix/zsyscall_dragonfly_amd64.go
index 556a0451..1b6eedfa 100644
--- a/unix/zsyscall_dragonfly_amd64.go
+++ b/unix/zsyscall_dragonfly_amd64.go
@@ -363,8 +363,8 @@ func pipe() (r int, w int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func pipe2(flags int) (r int, w int, err error) {
-	r0, r1, e1 := RawSyscall(SYS_PIPE2, uintptr(flags), 0, 0)
+func pipe2(p *[2]_C_int, flags int) (r int, w int, err error) {
+	r0, r1, e1 := RawSyscall(SYS_PIPE2, uintptr(unsafe.Pointer(p)), uintptr(flags), 0)
 	r = int(r0)
 	w = int(r1)
 	if e1 != 0 {