1 files changed, 3 insertions, 1 deletions
diff --git a/tmux.h b/tmux.h
index 53941da4..fdb649df 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1,4 +1,4 @@
-/* $Id: tmux.h,v 1.344 2009-06-25 17:02:59 nicm Exp $ */
+/* $Id $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -72,7 +72,9 @@ extern const char    *__progname;
 #define printflike5 __attribute__ ((format (printf, 5, 6)))
 
 /* Number of items in array. */
+#ifndef nitems
 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
+#endif
 
 /* Buffer macros. */
 #define BUFFER_USED(b) ((b)->size)