diff --git a/pi.c b/pi.c
index 3c8a635..bd78e40 100644
--- a/pi.c
+++ b/pi.c
@@ -171,6 +171,13 @@ static void pi_sync_interval(struct servo *servo, double interval)
 		 interval, s->kp, s->ki);
 }
 
+static void pi_reset(struct servo *servo)
+{
+	struct pi_servo *s = container_of(servo, struct pi_servo, servo);
+
+	s->count = 0;
+}
+
 struct servo *pi_servo_create(int fadj, int max_ppb, int sw_ts)
 {
 	struct pi_servo *s;
@@ -182,6 +189,7 @@ struct servo *pi_servo_create(int fadj, int max_ppb, int sw_ts)
 	s->servo.destroy = pi_destroy;
 	s->servo.sample  = pi_sample;
 	s->servo.sync_interval = pi_sync_interval;
+	s->servo.reset   = pi_reset;
 	s->drift         = fadj;
 	s->maxppb        = max_ppb;
 	s->first_update  = 1;
diff --git a/servo.c b/servo.c
index 45c5832..5af020a 100644
--- a/servo.c
+++ b/servo.c
@@ -46,3 +46,8 @@ void servo_sync_interval(struct servo *servo, double interval)
 {
 	servo->sync_interval(servo, interval);
 }
+
+void servo_reset(struct servo *servo)
+{
+	servo->reset(servo);
+}
diff --git a/servo.h b/servo.h
index 052740e..7a5d0d3 100644
--- a/servo.h
+++ b/servo.h
@@ -93,4 +93,10 @@ double servo_sample(struct servo *servo,
  */
 void servo_sync_interval(struct servo *servo, double interval);
 
+/**
+ * Reset a clock servo.
+ * @param servo   Pointer to a servo obtained via @ref servo_create().
+ */
+void servo_reset(struct servo *servo);
+
 #endif
diff --git a/servo_private.h b/servo_private.h
index 98c7db2..82e2bf5 100644
--- a/servo_private.h
+++ b/servo_private.h
@@ -30,6 +30,8 @@ struct servo {
 			 enum servo_state *state);
 
 	void (*sync_interval)(struct servo *servo, double interval);
+
+	void (*reset)(struct servo *servo);
 };
 
 #endif