diff --git a/specification/protocol/otlp.md b/specification/protocol/otlp.md
index 6c83e2dc5..0e5e6da0b 100644
--- a/specification/protocol/otlp.md
+++ b/specification/protocol/otlp.md
@@ -70,6 +70,11 @@ OTLP is a request/response style protocols: the clients send requests, the
 server replies with corresponding responses. This document defines one requests
 and response type: `Export`.
 
+All server components MUST support the following transport compression options:
+
+* No compression, denotated by `none`.
+* Gzip compression, denoted by `gzip`.
+
 ### OTLP/gRPC
 
 **Status**: [Stable](../document-status.md)