diff --git a/usr.bin/top/top.c b/usr.bin/top/top.c
index ac07430b6..c31e02bfb 100644
--- a/usr.bin/top/top.c
+++ b/usr.bin/top/top.c
@@ -2,11 +2,6 @@
 /* Author: Ben Gras <beng@few.vu.nl>  17 march 2006 */
 /* Modified for ProcFS by Alen Stojanov and David van Moolenbroek */
 
-#define _MINIX 1
-#ifndef __NBSD_LIBC
-#define _POSIX_SOURCE 1
-#endif
-
 #include <stdio.h>
 #include <unistd.h>
 #include <pwd.h>