--- ray/src/rt/rtmain.c	2003/06/26 00:58:10	2.5
+++ ray/src/rt/rtmain.c	2003/07/14 20:02:30	2.7
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: rtmain.c,v 2.5 2003/06/26 00:58:10 schorsch Exp $";
+static const char	RCSid[] = "$Id: rtmain.c,v 2.7 2003/07/14 20:02:30 schorsch Exp $";
 #endif
 /*
  *  rtmain.c - main for rtrace per-ray calculation program
@@ -11,6 +11,7 @@ static const char	RCSid[] = "$Id: rtmain.c,v 2.5 2003/
 #include  <signal.h>
 
 #include  "platform.h"
+#include  "rtprocess.h" /* getpid() */
 #include  "ray.h"
 #include  "source.h"
 #include  "ambient.h"