--- mod_gzip.c.org	2005-05-11 03:13:14.000000000 +0200
+++ mod_gzip.c	2008-06-27 01:13:37.000000000 +0200
@@ -86,6 +86,7 @@
 /* included automatically at this point in a pre-2.0 compile... */
 
 #include <sys/stat.h> /* For stat() call */
+#include <unistd.h>
 
 /* Version information... */