diff --git a/src/os/unix/ngx_files.h b/src/os/unix/ngx_files.h
index d4ad8a4..aa7311d 100644
--- a/src/os/unix/ngx_files.h
+++ b/src/os/unix/ngx_files.h
@@ -122,6 +122,9 @@
 #define ngx_delete_dir_n         "rmdir()"
 
 
+#define ngx_dir_access(a)        (a | (a & 0444) >> 2)
+
+
 #define ngx_de_name(dir)         ((u_char *) (dir)->de->d_name)
 #if (NGX_FREEBSD)
 #define ngx_de_namelen(dir)      (dir)->de->d_namlen