diff --git a/tools/z1/z1-bsl-nopic b/tools/z1/z1-bsl-nopic
index db2435b92..abb1798ba 100755
--- a/tools/z1/z1-bsl-nopic
+++ b/tools/z1/z1-bsl-nopic
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 # Serial Bootstrap Loader software for the MSP430 embedded proccessor.
 #
 # (C) 2001-2003 Chris Liechti <cliechti@gmx.net>