diff --git a/doc/python/sphinx/conf.py b/doc/python/sphinx/conf.py
index 6dcd2643edc..d0f6fa81506 100644
--- a/doc/python/sphinx/conf.py
+++ b/doc/python/sphinx/conf.py
@@ -107,4 +107,4 @@ todo_include_todos = True
 
 # -- Options for substitutions -----------------------------------------------
 
-rst_epilog = '.. |grpc_types_link| replace:: https://github.com/grpc/grpc/blob/%s/include/grpc/impl/codegen/grpc_types.h' % branch
+rst_epilog = '.. |channel_arg_names_link| replace:: https://github.com/grpc/grpc/blob/%s/include/grpc/impl/channel_arg_names.h' % branch
diff --git a/doc/python/sphinx/glossary.rst b/doc/python/sphinx/glossary.rst
index a4daa31d180..49911ae0fa7 100644
--- a/doc/python/sphinx/glossary.rst
+++ b/doc/python/sphinx/glossary.rst
@@ -45,6 +45,7 @@ Glossary
     server object. Channel arguments are meant for advanced usages and contain
     experimental API (some may not labeled as experimental). Full list of
     available channel arguments and documentation can be found under the
-    "grpc_arg_keys" section of "grpc_types.h" header file (|grpc_types_link|).
-    For example, if you want to disable TCP port reuse, you may construct
-    channel arguments like: ``options = (('grpc.so_reuseport', 0),)``.
+    "grpc_arg_keys" section of "channel_arg_names.h" header file
+    (|channel_arg_names_link|). For example, if you want to disable TCP port
+    reuse, you may construct channel arguments like:
+    ``options = (('grpc.so_reuseport', 0),)``.