diff --git a/sys/sys/conf.h b/sys/sys/conf.h
index 043c9df8397..285376b02ea 100644
--- a/sys/sys/conf.h
+++ b/sys/sys/conf.h
@@ -219,8 +219,6 @@ struct cdevsw {
 #define	d_gianttrick		__d_giant.gianttrick
 #define	d_postfree_list		__d_giant.postfree_list
 
-#define NUMCDEVSW 256
-
 struct module;
 
 struct devsw_module_data {