diff --git a/rev-tree.c b/rev-tree.c
index 03c900f459..95ec274fc7 100644
--- a/rev-tree.c
+++ b/rev-tree.c
@@ -1,8 +1,3 @@
-#define _XOPEN_SOURCE /* glibc2 needs this */
-#define _BSD_SOURCE /* for tm.tm_gmtoff */
-#include <time.h>
-#include <ctype.h>
-
 #include "cache.h"
 #include "commit.h"