diff --git a/src/dukutil.py b/src/dukutil.py
index 0d3a843c..895202b0 100644
--- a/src/dukutil.py
+++ b/src/dukutil.py
@@ -1,3 +1,4 @@
+#!/usr/bin/python
 #
 #  Python utilities shared by the build scripts.
 #