===================================================================
RCS file: /cvs/mandoc/mandocd.c,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -p -r1.3 -r1.4
--- mandoc/mandocd.c	2017/02/06 19:02:37	1.3
+++ mandoc/mandocd.c	2017/02/08 16:11:41	1.4
@@ -1,4 +1,4 @@
-/*	$Id: mandocd.c,v 1.3 2017/02/06 19:02:37 schwarze Exp $ */
+/*	$Id: mandocd.c,v 1.4 2017/02/08 16:11:41 schwarze Exp $ */
 /*
  * Copyright (c) 2017 Michael Stapelberg <stapelberg@debian.org>
  * Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -16,6 +16,10 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 #include "config.h"
+
+#if HAVE_CMSG_XPG42
+#define _XPG4_2
+#endif
 
 #include <sys/types.h>
 #include <sys/socket.h>