diff --git a/draft-ietf-quic-recovery.md b/draft-ietf-quic-recovery.md
index d27b4c665a..dafbf7d33f 100644
--- a/draft-ietf-quic-recovery.md
+++ b/draft-ietf-quic-recovery.md
@@ -575,8 +575,9 @@ dictated by packet and time threshold mechanisms; see {{ack-loss-detection}}.
 
 A Retry packet causes a client to send another Initial packet, effectively
 restarting the connection process.  A Retry packet indicates that the Initial
-was received, but not processed.  A Retry packet MUST NOT be treated as an
-acknowledgment.
+was received, but not processed.  A Retry packet cannot be treated as an
+acknowledgment, because it does not indicate that a packet was processed or
+specify the packet number.
 
 Clients that receive a Retry packet reset congestion control and loss recovery
 state, including resetting any pending timers.  Other connection state, in