diff --git a/src/os/unix/ngx_time.h b/src/os/unix/ngx_time.h
index ee5b47f..cdec417 100644
--- a/src/os/unix/ngx_time.h
+++ b/src/os/unix/ngx_time.h
@@ -23,8 +23,10 @@
 
 ngx_msec_t ngx_msec(void);
 
-/* STUB */
-#define ngx_time()     time(NULL)
+time_t ngx_time();
+
+extern time_t  ngx_cached_time;
+
 
 
 #endif /* _NGX_TIME_H_INCLUDED_ */