diff --git a/docs/graphics-protocol.rst b/docs/graphics-protocol.rst
index b5cebbfac..8f7d489bf 100644
--- a/docs/graphics-protocol.rst
+++ b/docs/graphics-protocol.rst
@@ -193,9 +193,9 @@ compression, then you must provide the ``S`` key with the size of the PNG data.
 Compression
 ~~~~~~~~~~~~~
 
-The client can send compressed image data to the terminal emulator, by specifying the
-``o`` key. Currently, only `RFC1950 <https://tools.ietf.org/html/rfc1950>`_ zlib based
-deflate compression is supported, which is specified using ``o=z``. For example::
+The client can send compressed image data to the terminal emulator, by
+specifying the ``o`` key. Currently, only :rfc:`1950` ZLIB based deflate
+compression is supported, which is specified using ``o=z``. For example::
 
     <ESC>_Gf=24,s=10,v=20,o=z;<payload><ESC>\