diff --git a/ngx_http_fancyindex_module.c b/ngx_http_fancyindex_module.c
index a719bc2..b59c6e9 100644
--- a/ngx_http_fancyindex_module.c
+++ b/ngx_http_fancyindex_module.c
@@ -35,16 +35,12 @@ typedef struct {
 
 #endif
 
-#define _BIT(_n)  (1 << (_n))
-
-#define NGX_HTTP_FANCYINDEX_README_TOP        (0)
-#define NGX_HTTP_FANCYINDEX_README_PRE        (0)
-#define NGX_HTTP_FANCYINDEX_README_ASIS   _BIT(1)
-#define NGX_HTTP_FANCYINDEX_README_BOTTOM _BIT(2)
-#define NGX_HTTP_FANCYINDEX_README_DIV    _BIT(3)
-#define NGX_HTTP_FANCYINDEX_README_IFRAME _BIT(4)
-
-#undef _BIT
+#define NGX_HTTP_FANCYINDEX_README_TOP    0x00
+#define NGX_HTTP_FANCYINDEX_README_PRE    0x00
+#define NGX_HTTP_FANCYINDEX_README_ASIS   0x01
+#define NGX_HTTP_FANCYINDEX_README_BOTTOM 0x02
+#define NGX_HTTP_FANCYINDEX_README_DIV    0x04
+#define NGX_HTTP_FANCYINDEX_README_IFRAME 0x08
 
 
 typedef struct {