diff --git a/src/pkg/syscall/syscall_bsd.go b/src/pkg/syscall/syscall_bsd.go
index 114a9636754..767537093e5 100644
--- a/src/pkg/syscall/syscall_bsd.go
+++ b/src/pkg/syscall/syscall_bsd.go
@@ -323,8 +323,10 @@ func Socket(domain, typ, proto int) (fd, errno int) {
 	return
 }
 
+//sys socketpair(domain int, typ int, proto int, fd *[2]int) (errno int)
+
 func Socketpair(domain, typ, proto int) (fd [2]int, errno int) {
-	fd, errno = socketpair(domain, typ, proto)
+	errno = socketpair(domain, typ, proto, &fd)
 	return
 }