diff --git a/docs/library/index.rst b/docs/library/index.rst
index 5ae1ed86f4..9b89bcfa07 100644
--- a/docs/library/index.rst
+++ b/docs/library/index.rst
@@ -105,6 +105,7 @@ library.
       uheapq.rst
       ujson.rst
       ure.rst
+      usocket.rst
       ustruct.rst
       uzlib.rst