--- mandoc-1.14.5/test-recvmsg.c	2019-03-10 04:56:43.000000000 -0500
+++ mandoc-1.14.5/test-recvmsg.c	2020-06-04 20:08:33.420299034 -0500
@@ -4,5 +4,6 @@
 int
 main(void)
 {
-	return recvmsg(-1, NULL, 0) != -1;
+	struct msghdr buf;
+	return recvmsg(-1, &buf, 0) != -1;
 }