diff --git a/src/os/unix/ngx_time.c b/src/os/unix/ngx_time.c
index 12256e1..bf3432b 100644
--- a/src/os/unix/ngx_time.c
+++ b/src/os/unix/ngx_time.c
@@ -1,11 +1,12 @@
 
 #include <ngx_config.h>
-#include <ngx_time.h>
+#include <ngx_core.h>
+
 
 void ngx_localtime(ngx_tm_t *tm)
 {
-    time_t clock = time(NULL);
-    localtime_r(&clock, tm);
+    localtime_r(&ngx_cached_time, tm);
+
     tm->ngx_tm_mon++;
     tm->ngx_tm_year += 1900;
 }
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_ */