diff --git a/pimd/pim_time.h b/pimd/pim_time.h
index 379eb6c..2984d9a 100644
--- a/pimd/pim_time.h
+++ b/pimd/pim_time.h
@@ -34,6 +34,7 @@
 void pim_time_timer_to_mmss(char *buf, int buf_size, struct thread *t);
 void pim_time_timer_to_hhmmss(char *buf, int buf_size, struct thread *t);
 void pim_time_uptime(char *buf, int buf_size, int64_t uptime_sec);
+void pim_time_uptime_begin(char *buf, int buf_size, int64_t now, int64_t begin);
 long pim_time_timer_remain_msec(struct thread *t_timer);
 
 #endif /* PIM_TIME_H */