diff --git a/draft-ietf-quic-transport.md b/draft-ietf-quic-transport.md
index 561d58db22..5818847a3d 100644
--- a/draft-ietf-quic-transport.md
+++ b/draft-ietf-quic-transport.md
@@ -2113,7 +2113,7 @@ Error Code:
 
 Reason Phrase Length:
 
-: A 16-bit unsigned number specifying the length of the reason phrase.  Note
+: A 16-bit unsigned number specifying the length of the reason phrase in bytes. Note
   that a CONNECTION_CLOSE frame cannot be split between packets, so in practice
   any limits on packet size will also limit the space available for a reason
   phrase.