diff --git a/libtiff/tif_unix.c b/libtiff/tif_unix.c
index f74bd515..413ac5c6 100644
--- a/libtiff/tif_unix.c
+++ b/libtiff/tif_unix.c
@@ -1,4 +1,4 @@
-/* $Id: tif_unix.c,v 1.8 2004-11-28 15:04:54 dron Exp $ */
+/* $Id: tif_unix.c,v 1.9 2005-07-12 12:03:15 dron Exp $ */
 
 /*
  * Copyright (c) 1988-1997 Sam Leffler
@@ -37,15 +37,15 @@
 # include <unistd.h>
 #endif
 
-#if HAVE_FCNTL_H
+#ifdef HAVE_FCNTL_H
 # include <fcntl.h>
 #endif
 
-#if HAVE_SYS_TYPES_H
+#ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 
-#if HAVE_IO_H
+#ifdef HAVE_IO_H
 # include <io.h>
 #endif