===================================================================
RCS file: /cvs/mandoc/catman.c,v
retrieving revision 1.15
retrieving revision 1.16
diff -u -p -r1.15 -r1.16
--- mandoc/catman.c	2017/02/08 14:50:53	1.15
+++ mandoc/catman.c	2017/02/08 16:11:40	1.16
@@ -1,4 +1,4 @@
-/*	$Id: catman.c,v 1.15 2017/02/08 14:50:53 schwarze Exp $ */
+/*	$Id: catman.c,v 1.16 2017/02/08 16:11:40 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>