--- ray/src/px/ra_pr24.c	1992/09/23 09:17:53	2.4
+++ ray/src/px/ra_pr24.c	1992/10/02 16:25:49	2.5
@@ -14,13 +14,13 @@ static char SCCSid[] = "$SunId$ LBL";
 #include  <fcntl.h>
 #endif
 
+#include  <math.h>
+
 #include  "rasterfile.h"
 
 #include  "color.h"
 
 #include  "resolu.h"
-
-extern double  pow();
 
 extern char  *malloc();