diff --git a/draft-ietf-quic-recovery.md b/draft-ietf-quic-recovery.md
index 210eaf848a..3957a55f75 100644
--- a/draft-ietf-quic-recovery.md
+++ b/draft-ietf-quic-recovery.md
@@ -719,10 +719,12 @@ as follows:
 
 For example, assume:
 
+~~~
   smoothed_rtt = 1
   rttvar = 0
   max_ack_delay = 0
   kPersistentCongestionThreshold = 3
+~~~
 
 If an ack-eliciting packet is sent at time = 0, the following scenario would
 illustrate persistent congestion:
@@ -1407,15 +1409,23 @@ Invoked when an ACK frame with an ECN section is received from the peer.
 Invoked from DetectLostPackets when packets are deemed lost.
 
 ~~~
-   InPersistentCongestion(largest_lost_packet):
+   InPersistentCongestion(lost_packets):
      pto = smoothed_rtt + max(4 * rttvar, kGranularity) +
        max_ack_delay
      congestion_period = pto * kPersistentCongestionThreshold
+
+     earliest_lost_packet = lost_packets.first()
+     largest_lost_packet = lost_packets.last()
+
      // Determine if all packets in the time period before the
      // newest lost packet, including the edges, are marked
      // lost
-     return AreAllPacketsLost(largest_lost_packet,
-                              congestion_period)
+     all_packets_lost =
+       lost_packets.length() == (lost_packets.last().packet_number -
+                                 lost_packets.first().packet_number + 1)
+
+     return all_packets_lost && congestion_period >
+       largest_lost_packet.time_sent - earliest_lost_packet.time_sent
 
    OnPacketsLost(lost_packets):
      // Remove lost packets from bytes_in_flight.
@@ -1425,7 +1435,7 @@ Invoked from DetectLostPackets when packets are deemed lost.
      CongestionEvent(largest_lost_packet.time_sent)
 
      // Collapse congestion window if persistent congestion
-     if (InPersistentCongestion(largest_lost_packet)):
+     if (InPersistentCongestion(lost_packets)):
        congestion_window = kMinimumWindow
 ~~~