diff --git a/README b/README
index 51b7981d..0f33707f 100644
--- a/README
+++ b/README
@@ -39,6 +39,7 @@ Functionality implemented include:
  - FFDHE prime/group negotiation (RFC 7919)
  - Heartbeat Extension (RFC 6520)
  - Record Size Limit (RFC 8449)
+ - TLS Certificate Compression (RFC 8879)
 
 
 tlslite-ng aims to be a drop-in replacement for tlslite while providing more