diff --git a/docs/conf.py b/docs/conf.py
index 4900acb0..3ea0b382 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -47,7 +47,7 @@
 
 def skip_builtin_methods(app, what, name, obj, skip, options):
     """Skip documentation of builtin methods."""
-    if what != "method":
+    if what not in ("method", "function"):
         return skip
     try:
         obj.__objclass__