diff --git a/include/haproxy/clock.h b/include/haproxy/clock.h
index 8ce41e79e..264363e27 100644
--- a/include/haproxy/clock.h
+++ b/include/haproxy/clock.h
@@ -48,6 +48,7 @@ char *timeofday_as_iso_us(int pad);
 uint clock_report_idle(void);
 void clock_leaving_poll(int timeout, int interrupted);
 void clock_entering_poll(void);
+void clock_adjust_now_offset(void);
 
 static inline void clock_update_date(int max_wait, int interrupted)
 {
diff --git a/src/clock.c b/src/clock.c
index 7cf71607f..ec2133c8b 100644
--- a/src/clock.c
+++ b/src/clock.c
@@ -304,6 +304,11 @@ void clock_init_process_date(void)
 	clock_update_date(0, 1);
 }
 
+void clock_adjust_now_offset(void)
+{
+	HA_ATOMIC_STORE(&now_offset, now_ns - tv_to_ns(&date));
+}
+
 /* must be called once per thread to initialize their thread-local variables.
  * Note that other threads might also be initializing and running in parallel.
  */