--- libgc/include/private/gcconfig.h.orig	2009-03-03 14:22:28 -0800
+++ libgc/include/private/gcconfig.h	2009-03-03 14:24:56 -0800
@@ -351,6 +351,9 @@
 #   define OPENBSD
 #   define mach_type_known
 # endif
+# if defined(__DragonFly__)
+# define FREEBSD
+# endif
 # if defined(FREEBSD) && (defined(i386) || defined(__i386__))
 #   define I386
 #   define mach_type_known
