--- ray/src/rt/srcobstr.c	2007/07/25 04:12:36	2.13
+++ ray/src/rt/srcobstr.c	2009/12/12 00:03:42	2.15
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: srcobstr.c,v 2.13 2007/07/25 04:12:36 greg Exp $";
+static const char RCSid[] = "$Id: srcobstr.c,v 2.15 2009/12/12 00:03:42 greg Exp $";
 #endif
 /*
  * Source occlusion caching routines
@@ -11,6 +11,8 @@ static const char RCSid[] = "$Id: srcobstr.c,v 2.13 20
 
 #include  "otspecial.h"
 
+#include  "rtotypes.h"
+
 #include  "source.h"
 
 #define ABS(x)  ((x)>0 ? (x) : -(x))
@@ -178,7 +180,7 @@ initobscache(int sn)
 static OBJECT *			/* return occluder cache entry */
 srcobstructp(register RAY *r)
 {
-	static unsigned long	lastrno = ~0;
+	static RNUMBER	lastrno = ~0;
 	static OBJECT   noobs;
 	static OBJECT	*lastobjp;
 	SRCREC		*srcp;