diff --git a/clock.c b/clock.c
index 5a475f2..b0a4de6 100644
--- a/clock.c
+++ b/clock.c
@@ -867,6 +867,7 @@ enum servo_state clock_synchronize(struct clock *c,
 	case SERVO_UNLOCKED:
 		break;
 	case SERVO_JUMP:
+		clock_ppb(c->clkid, -adj);
 		clock_step(c->clkid, -c->master_offset);
 		c->t1 = tmv_zero();
 		c->t2 = tmv_zero();
diff --git a/pi.c b/pi.c
index 5fbce38..934fff6 100644
--- a/pi.c
+++ b/pi.c
@@ -87,6 +87,7 @@ static double pi_sample(struct servo *servo,
 		break;
 	case 3:
 		*state = SERVO_JUMP;
+		ppb = s->drift;
 		s->count = 4;
 		break;
 	case 4: