#3216: fix Execute's parameter description.
diff --git a/Doc/library/msilib.rst b/Doc/library/msilib.rst
index fd66600..7dc3632 100644
--- a/Doc/library/msilib.rst
+++ b/Doc/library/msilib.rst
@@ -1,4 +1,3 @@
-
:mod:`msilib` --- Read and write Microsoft Installer files
==========================================================
@@ -165,11 +164,11 @@
------------
-.. method:: View.Execute([params=None])
+.. method:: View.Execute(params)
- Execute the SQL query of the view, through :cfunc:`MSIViewExecute`. *params* is
- an optional record describing actual values of the parameter tokens in the
- query.
+ Execute the SQL query of the view, through :cfunc:`MSIViewExecute`. If
+ *params* is not ``None``, it is a record describing actual values of the
+ parameter tokens in the query.
.. method:: View.GetColumnInfo(kind)