--- xc.orig/config/cf/xorg.cf    2004-09-21 18:15:53.000000000 +0000
+++ xc/config/cf/xorg.cf     2004-09-21 18:17:03.000000000 +0000
@@ -608,6 +608,10 @@
 
 #endif
 
+#ifndef DevelDRIDrivers
+#define DevelDRIDrivers mach64
+#endif
+
 /* Sparc64 Drivers */
 #if defined(OpenBSDArchitecture) && defined(Sparc64Architecture)
 /* Amiga framebuffer module */