diff --git a/lib/isc/include/isc/timer.h b/lib/isc/include/isc/timer.h
index b86d74e4aa..78a0a583df 100644
--- a/lib/isc/include/isc/timer.h
+++ b/lib/isc/include/isc/timer.h
@@ -29,9 +29,6 @@
  *	They are used to implement both (possibly expiring) idle timers and
  *	'one-shot' timers.
  *
- *\li	'limited' timers generate a periodic tick event until they reach
- *	their lifetime when they generate a life timeout event.
- *
  *\li	'inactive' timers generate no events.
  *
  * Timers can change type.  It is typical to create a timer as
@@ -83,7 +80,6 @@ typedef enum {
 	isc_timertype_undefined = -1, /*%< Undefined */
 	isc_timertype_ticker = 0,     /*%< Ticker */
 	isc_timertype_once = 1,	      /*%< Once */
-	isc_timertype_limited = 2,    /*%< Limited */
 	isc_timertype_inactive = 3    /*%< Inactive */
 } isc_timertype_t;
 
diff --git a/lib/isc/timer.c b/lib/isc/timer.c
index 30de75632f..fad06767ae 100644
--- a/lib/isc/timer.c
+++ b/lib/isc/timer.c
@@ -116,11 +116,6 @@ schedule(isc_timer_t *timer, isc_time_t *now, bool signal_ok) {
 		if (result != ISC_R_SUCCESS) {
 			return (result);
 		}
-		if (timer->type == isc_timertype_limited &&
-		    isc_time_compare(&timer->expires, &due) < 0)
-		{
-			due = timer->expires;
-		}
 	} else {
 		if (isc_time_isepoch(&timer->idle)) {
 			due = timer->expires;
@@ -256,8 +251,6 @@ isc_timer_create(isc_timermgr_t *manager, isc_timertype_t type,
 	REQUIRE(type == isc_timertype_inactive ||
 		!(isc_time_isepoch(expires) && isc_interval_iszero(interval)));
 	REQUIRE(timerp != NULL && *timerp == NULL);
-	REQUIRE(type != isc_timertype_limited ||
-		!(isc_time_isepoch(expires) || isc_interval_iszero(interval)));
 
 	/*
 	 * Get current time.
@@ -366,8 +359,6 @@ isc_timer_reset(isc_timer_t *timer, isc_timertype_t type,
 	}
 	REQUIRE(type == isc_timertype_inactive ||
 		!(isc_time_isepoch(expires) && isc_interval_iszero(interval)));
-	REQUIRE(type != isc_timertype_limited ||
-		!(isc_time_isepoch(expires) || isc_interval_iszero(interval)));
 
 	/*
 	 * Get current time.
@@ -508,18 +499,6 @@ dispatch(isc_timermgr_t *manager, isc_time_t *now) {
 				type = ISC_TIMEREVENT_TICK;
 				post_event = true;
 				need_schedule = true;
-			} else if (timer->type == isc_timertype_limited) {
-				int cmp;
-				cmp = isc_time_compare(now, &timer->expires);
-				if (cmp >= 0) {
-					type = ISC_TIMEREVENT_LIFE;
-					post_event = true;
-					need_schedule = false;
-				} else {
-					type = ISC_TIMEREVENT_TICK;
-					post_event = true;
-					need_schedule = true;
-				}
 			} else if (!isc_time_isepoch(&timer->expires) &&
 				   isc_time_compare(now, &timer->expires) >= 0)
 			{