diff --git a/local.c b/local.c
index e5ac43f..b4baaac 100644
--- a/local.c
+++ b/local.c
@@ -700,10 +700,10 @@ LCL_CanSystemLeap(void)
 /* ================================================== */
 
 void
-LCL_SetSystemLeap(int leap)
+LCL_SetSystemLeap(int leap, int tai_offset)
 {
   if (drv_set_leap) {
-    (drv_set_leap)(leap);
+    (drv_set_leap)(leap, tai_offset);
   }
 }
 
diff --git a/local.h b/local.h
index 618a0bd..7ceb76a 100644
--- a/local.h
+++ b/local.h
@@ -201,10 +201,11 @@ extern int LCL_MakeStep(void);
    does something */
 extern int LCL_CanSystemLeap(void);
 
-/* Routine to set the system clock to correct itself for a leap second if
-   supported.  Leap second will be inserted at the end of the day if the
-   argument is positive, deleted if negative, and zero resets the setting. */
-extern void LCL_SetSystemLeap(int leap);
+/* Routine to set the system clock to correct itself for a leap second and also
+   set its TAI-UTC offset.  If supported, leap second will be inserted at the
+   end of the day if the argument is positive, deleted if negative, and zero
+   resets the setting. */
+extern void LCL_SetSystemLeap(int leap, int tai_offset);
 
 /* Routine to set a frequency correction (in ppm) that should be applied
    to local clock to compensate for temperature changes.  A positive
diff --git a/localp.h b/localp.h
index fbbeb3e..6f65e43 100644
--- a/localp.h
+++ b/localp.h
@@ -54,8 +54,8 @@ typedef int (*lcl_ApplyStepOffsetDriver)(double offset);
    raw time to get the corrected time */
 typedef void (*lcl_OffsetCorrectionDriver)(struct timespec *raw, double *corr, double *err);
 
-/* System driver to schedule leap second */
-typedef void (*lcl_SetLeapDriver)(int leap);
+/* System driver to schedule leap seconds and set TAI-UTC offset */
+typedef void (*lcl_SetLeapDriver)(int leap, int tai_offset);
 
 /* System driver to set the synchronisation status */
 typedef void (*lcl_SetSyncStatusDriver)(int synchronised, double est_error, double max_error);
diff --git a/reference.c b/reference.c
index d5c049f..aa151d1 100644
--- a/reference.c
+++ b/reference.c
@@ -678,7 +678,7 @@ leap_end_timeout(void *arg)
   our_leap_sec = 0;
 
   if (leap_mode == REF_LeapModeSystem)
-    LCL_SetSystemLeap(0);
+    LCL_SetSystemLeap(our_leap_sec, 0);
 
   if (our_leap_status == LEAP_InsertSecond ||
       our_leap_status == LEAP_DeleteSecond)
@@ -778,7 +778,7 @@ update_leap_status(NTP_Leap leap, time_t now, int reset)
 
     switch (leap_mode) {
       case REF_LeapModeSystem:
-        LCL_SetSystemLeap(our_leap_sec);
+        LCL_SetSystemLeap(our_leap_sec, 0);
         /* Fall through */
       case REF_LeapModeSlew:
       case REF_LeapModeStep:
diff --git a/sys_timex.c b/sys_timex.c
index d50bf26..aa273cd 100644
--- a/sys_timex.c
+++ b/sys_timex.c
@@ -95,7 +95,7 @@ set_frequency(double freq_ppm)
 /* ================================================== */
 
 static void
-set_leap(int leap)
+set_leap(int leap, int tai_offset)
 {
   struct timex txc;
   int applied;