--- ray/src/util/rad.c	2015/05/27 14:12:09	2.115
+++ ray/src/util/rad.c	2015/08/01 23:27:04	2.119
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: rad.c,v 2.115 2015/05/27 14:12:09 greg Exp $";
+static const char	RCSid[] = "$Id: rad.c,v 2.119 2015/08/01 23:27:04 greg Exp $";
 #endif
 /*
  * Executive program for oconv, rpict and pfilt
@@ -9,6 +9,7 @@ static const char	RCSid[] = "$Id: rad.c,v 2.115 2015/0
 
 #include <ctype.h>
 #include <time.h>
+#include <signal.h>
 
 #include "platform.h"
 #include "rtprocess.h"
@@ -644,6 +645,8 @@ mkpmap(void)			/* run mkpmap if indicated */
 		for (cp = combuf; *cp; cp++)
 			;
 		mkpmapopts(cp);
+				/* force file overwrite */
+		cp = addarg(cp, "-fo+");
 		if (vdef(REPORT)) {
 			char	errfile[256];
 			int	n;