--- OLD/xc/programs/rgb/showrgb.c	Thu Jan  1 00:00:00 1970
+++ NEW/xc/programs/rgb/showrgb.c	Thu Jan  1 00:00:00 1970
@@ -40,6 +40,7 @@
 
 #undef NULL
 #include <stdio.h>
+#include <stdlib.h>
 #include <X11/Xos.h>
 #include "rgb.h"			/* off in server/include/ */
 #include "site.h"