diff --git a/hw/hpet.c b/hw/hpet.c
index 35466ae..92d5f58 100644
--- a/hw/hpet.c
+++ b/hw/hpet.c
@@ -32,6 +32,7 @@
 #include "sysbus.h"
 #include "mc146818rtc.h"
 #include "sysemu.h"
+#include <assert.h>
 
 //#define HPET_DEBUG
 #ifdef HPET_DEBUG
@@ -42,6 +43,9 @@
 
 #define HPET_MSI_SUPPORT        0
 
+#define MAX_TICKS_NOT_ACCOUNTED     (uint64_t)500000000 /* 5 sec */
+#define MAX_IRQ_RATE                (uint32_t)10
+
 struct HPETState;
 typedef struct HPETTimer {  /* timers */
     uint8_t tn;             /*timer number*/
@@ -326,28 +330,63 @@ static const VMStateDescription vmstate_hpet = {
     }
 };
 
+static bool hpet_timer_has_tick_backlog(HPETTimer *t)
+{
+    uint64_t backlog = t->ticks_not_accounted - (t->period + t->prev_period);
+    return (backlog >= t->period);
+}
+
 /*
  * timer expiration callback
  */
 static void hpet_timer(void *opaque)
 {
     HPETTimer *t = opaque;
+    HPETState *s = t->state;
     uint64_t diff;
-
+    int irq_delivered = 0;
+    uint32_t irq_count = 0;
     uint64_t period = t->period;
     uint64_t cur_tick = hpet_get_ticks(t->state);
 
+    if (s->driftfix && !t->ticks_not_accounted) {
+        t->ticks_not_accounted = t->prev_period = t->period;
+    }
     if (timer_is_periodic(t) && period != 0) {
         if (t->config & HPET_TN_32BIT) {
             while (hpet_time_after(cur_tick, t->cmp)) {
                 t->cmp = (uint32_t)(t->cmp + t->period);
+                t->ticks_not_accounted += t->period;
+                irq_count++;
             }
         } else {
             while (hpet_time_after64(cur_tick, t->cmp)) {
                 t->cmp += period;
+                t->ticks_not_accounted += period;
+                irq_count++;
             }
         }
         diff = hpet_calculate_diff(t, cur_tick);
+        if (s->driftfix) {
+            if (t->ticks_not_accounted > MAX_TICKS_NOT_ACCOUNTED) {
+                t->ticks_not_accounted = t->period + t->prev_period;
+            }
+            if (hpet_timer_has_tick_backlog(t)) {
+                if (t->irq_rate == 1 || irq_count > 1) {
+                    t->irq_rate++;
+                    t->irq_rate = MIN(t->irq_rate, MAX_IRQ_RATE);
+                }
+                if (t->divisor == 0) {
+                    assert(irq_count);
+                }
+                if (irq_count) {
+                    t->divisor = t->irq_rate;
+                }
+                diff /= t->divisor--;
+            } else {
+                t->irq_rate = 1;
+            }
+        }
         qemu_mod_timer(t->qemu_timer,
                        qemu_get_clock_ns(vm_clock) + (int64_t)ticks_to_ns(diff));
     } else if (t->config & HPET_TN_32BIT && !timer_is_periodic(t)) {
@@ -358,7 +397,22 @@ static void hpet_timer(void *opaque)
             t->wrap_flag = 0;
         }
     }
-    update_irq(t, 1);
+    if (s->driftfix && timer_is_periodic(t) && period != 0) {
+        if (t->ticks_not_accounted >= t->period + t->prev_period) {
+            irq_delivered = update_irq(t, 1);
+            if (irq_delivered) {
+                t->ticks_not_accounted -= t->prev_period;
+                t->prev_period = t->period;
+            } else {
+                if (irq_count) {
+                    t->irq_rate++;
+                    t->irq_rate = MIN(t->irq_rate, MAX_IRQ_RATE);
+                }
+            }
+        }
+    } else {
+        update_irq(t, 1);
+    }
 }
 
 static void hpet_set_timer(HPETTimer *t)
@@ -697,6 +751,11 @@ static void hpet_reset(DeviceState *d)
         timer->config |=  0x00000004ULL << 32;
         timer->period = 0ULL;
         timer->wrap_flag = 0;
+
+        timer->prev_period = 0;
+        timer->ticks_not_accounted = 0;
+        timer->irq_rate = 1;
+        timer->divisor = 1;
     }
 
     s->hpet_counter = 0ULL;