diff --git a/draft-ietf-quic-ack-frequency.md b/draft-ietf-quic-ack-frequency.md
index c02a93c..67206ca 100644
--- a/draft-ietf-quic-ack-frequency.md
+++ b/draft-ietf-quic-ack-frequency.md
@@ -266,7 +266,7 @@ Requested Max Ack Delay:
   of 2^14 or greater are invalid for max_ack_delay. A value smaller than
   the min_ack_delay advertised by the peer is also invalid. Receipt of an
   invalid value MUST be treated as a connection error of type
-  FRAME_ENCODING_ERROR. 
+  FRAME_ENCODING_ERROR.
 
 Reordering Threshold: