diff --git a/Mailman/Archiver/pipermail.py b/Mailman/Archiver/pipermail.py
index 49de805..da582d2 100644
--- a/Mailman/Archiver/pipermail.py
+++ b/Mailman/Archiver/pipermail.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/python
 
 from __future__ import nested_scopes
 
diff --git a/Mailman/Post.py b/Mailman/Post.py
index 5b7af77..63edd38 100644
--- a/Mailman/Post.py
+++ b/Mailman/Post.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/python
 #
 # Copyright (C) 2001,2002 by the Free Software Foundation, Inc.
 #
diff --git a/bin/msgfmt.py b/bin/msgfmt.py
index 8a2d4e6..277901c 100755
--- a/bin/msgfmt.py
+++ b/bin/msgfmt.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/python
 # -*- coding: iso-8859-1 -*-
 # Written by Martin v. Löwis <loewis@informatik.hu-berlin.de>
 
diff --git a/tests/fblast.py b/tests/fblast.py
index 092e420..67904f4 100644
--- a/tests/fblast.py
+++ b/tests/fblast.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/python
 """Throw email at Mailman as fast as you can.
 
 This is not a unit test, it's a functional test, so you can't run it within
diff --git a/tests/onebounce.py b/tests/onebounce.py
index 2b05807..cc9296a 100755
--- a/tests/onebounce.py
+++ b/tests/onebounce.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/python
 
 # Copyright (C) 2002 by the Free Software Foundation, Inc.
 #