===================================================================
RCS file: /cvs/mandoc/catman.c,v
retrieving revision 1.17
retrieving revision 1.18
diff -u -p -r1.17 -r1.18
--- mandoc/catman.c	2017/02/09 18:46:44	1.17
+++ mandoc/catman.c	2017/02/09 20:53:33	1.18
@@ -1,4 +1,4 @@
-/*	$Id: catman.c,v 1.17 2017/02/09 18:46:44 schwarze Exp $ */
+/*	$Id: catman.c,v 1.18 2017/02/09 20:53:33 schwarze Exp $ */
 /*
  * Copyright (c) 2017 Michael Stapelberg <stapelberg@debian.org>
  * Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -61,10 +61,11 @@ run_mandocd(int sockfd, const char *outtype, const cha
 	if (snprintf(sockfdstr, sizeof(sockfdstr), "%d", sockfd) == -1)
 		err(1, "snprintf");
 	if (defos == NULL)
-		execlp("mandocd", "mandocd", "-T", outtype, sockfdstr, NULL);
+		execlp("mandocd", "mandocd", "-T", outtype,
+		    sockfdstr, (char *)NULL);
 	else
 		execlp("mandocd", "mandocd", "-T", outtype,
-		    "-I", defos, sockfdstr, NULL);
+		    "-I", defos, sockfdstr, (char *)NULL);
 	err(1, "exec");
 }