--- brlcad-7.16.6/src/other/openNURBS/opennurbs_system.h	2010-01-19 00:27:03.000000000 -0200
+++ brlcad-7.16.6_patches/src/other/openNURBS/opennurbs_system.h	2010-04-28 22:58:03.712951143 -0300
@@ -194,6 +194,7 @@
 extern "C" {
 #endif
 
+#include <stddef.h>
 #include <stdlib.h>
 #include <memory.h>
 #include <string.h>