diff --git a/thingamajig_disasm.py b/thingamajig_disasm.py
index fda93b6..6320bb2 100644
--- a/thingamajig_disasm.py
+++ b/thingamajig_disasm.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 from collections import namedtuple
 
 Opcode = namedtuple('Opcode', ('mnemonic', 'rx', 'ry', 'addr'))