diff --git a/scripts/calib.py b/scripts/calib.py
index f969e4b..9bcaf85 100755
--- a/scripts/calib.py
+++ b/scripts/calib.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 from amodem import calib
 
 import argparse
diff --git a/scripts/recv.py b/scripts/recv.py
index 883af86..9d9d761 100755
--- a/scripts/recv.py
+++ b/scripts/recv.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 import sys
 import logging
 logging.basicConfig(level=logging.DEBUG,
diff --git a/scripts/send.py b/scripts/send.py
index a3de958..6ea97dc 100755
--- a/scripts/send.py
+++ b/scripts/send.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 import sys
 import logging
 logging.basicConfig(level=logging.DEBUG,
diff --git a/scripts/wave.py b/scripts/wave.py
index 3337d0e..115fae0 100755
--- a/scripts/wave.py
+++ b/scripts/wave.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 import logging
 logging.basicConfig(level=logging.DEBUG, format='%(message)s')