diff --git a/draft-ietf-quic-recovery.md b/draft-ietf-quic-recovery.md
index 2226361dab..db0b5c28d1 100644
--- a/draft-ietf-quic-recovery.md
+++ b/draft-ietf-quic-recovery.md
@@ -845,7 +845,7 @@ approximately equivalent to two TLPs before an RTO in TCP.
 This duration is computed as follows:
 
 ~~~
-(smoothed_rtt + 4 * rttvar + max_ack_delay) *
+(smoothed_rtt + max(4 * rttvar, kGranularity) + max_ack_delay) *
     kPersistentCongestionThreshold
 ~~~