diff --git a/doc/sphinx/lfun/logon.rst b/doc/sphinx/lfun/logon.rst
new file mode 100644
index 0000000..f867428
--- /dev/null
+++ b/doc/sphinx/lfun/logon.rst
@@ -0,0 +1,26 @@
+logon()
+=======
+
+SYNOPSIS
+--------
+::
+
+	int logon(void)
+
+DESCRIPTION
+-----------
+::
+
+	When the parser accepts a new connection, it first calls
+	connect() in the master object and then applies logon() to
+	the object that is returned by the master. That will usually be
+	a special login object, that is expected to clone and get going
+	a user shell or player object.
+	Should return 0 on failure, everything else means success.
+
+SEE ALSO
+--------
+::
+
+	connect(M)
+