diff --git a/src/github.com/matrix-org/dendrite/mediaapi/README.md b/src/github.com/matrix-org/dendrite/mediaapi/README.md
index 2f51e8fe6..de171ea76 100644
--- a/src/github.com/matrix-org/dendrite/mediaapi/README.md
+++ b/src/github.com/matrix-org/dendrite/mediaapi/README.md
@@ -1,3 +1,5 @@
 # Media API
 
-This server is responsible for serving `/media` requests
+This server is responsible for serving `/media` requests as per:
+
+http://matrix.org/docs/spec/client_server/r0.2.0.html#id43