diff --git a/include/tar.h b/include/tar.h
index 2eba66ec..be589842 100644
--- a/include/tar.h
+++ b/include/tar.h
@@ -1,13 +1,9 @@
 #ifndef	_TAR_H
 #define	_TAR_H
 
-#include <features.h>
-
 #define TSUID   04000
 #define TSGID   02000
-#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) || defined(_XOPEN_SOURCE)
 #define TSVTX   01000
-#endif
 #define TUREAD  00400
 #define TUWRITE 00200
 #define TUEXEC  00100