1 files changed, 7 insertions, 0 deletions
diff --git a/man3/cmsg.3 b/man3/cmsg.3
index a537a0c69b..060b96fd8c 100644
--- a/man3/cmsg.3
+++ b/man3/cmsg.3
@@ -200,12 +200,19 @@ struct msghdr msg = { 0 };
 struct cmsghdr *cmsg;
 int myfds[NUM_FD];  /* Contains the file descriptors to pass */
 int *fdptr;
+char iobuf[1];
+struct iovec io = {
+    .iov_base = iobuf,
+    .iov_len = sizeof(iobuf)
+};
 union {         /* Ancillary data buffer, wrapped in a union
                    in order to ensure it is suitably aligned */
     char buf[CMSG_SPACE(sizeof(myfds))];
     struct cmsghdr align;
 } u;
 
+msg.msg_iov = &io;
+msg.msg_iovlen = 1;
 msg.msg_control = u.buf;
 msg.msg_controllen = sizeof(u.buf);
 cmsg = CMSG_FIRSTHDR(&msg);