diff --git a/doc/Makefile.am b/doc/Makefile.am
index 4e992625..de438968 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -127,6 +127,7 @@ APIDOCS= \
 	nghttp2_session_server_new.rst \
 	nghttp2_session_server_new2.rst \
 	nghttp2_session_server_new3.rst \
+	nghttp2_session_set_local_window_size.rst \
 	nghttp2_session_set_next_stream_id.rst \
 	nghttp2_session_set_stream_user_data.rst \
 	nghttp2_session_terminate_session.rst \