diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -1310,6 +1310,8 @@ def help_(ui, name=None, with_version=Fa
             f = c.split("|", 1)[0]
             if select and not select(f):
                 continue
+            if select is None and e[0].__module__ != __name__:
+                continue
             if name == "shortlist" and not f.startswith("^"):
                 continue
             f = f.lstrip("^")