diff --git a/asn1/utils/asn1tostruct.py b/asn1/utils/asn1tostruct.py
index 1a2d95f..8364c27 100755
--- a/asn1/utils/asn1tostruct.py
+++ b/asn1/utils/asn1tostruct.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import re, os, sys, string
 import datetime