diff --git a/tools/gen-device-avr.py b/tools/gen-device-avr.py
index 7e32808a..becd4cd8 100755
--- a/tools/gen-device-avr.py
+++ b/tools/gen-device-avr.py
@@ -1,4 +1,6 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
+
+from __future__ import print_function
 
 import sys
 import os
diff --git a/tools/gen-device-svd.py b/tools/gen-device-svd.py
index fc9e3f16..990b2080 100755
--- a/tools/gen-device-svd.py
+++ b/tools/gen-device-svd.py
@@ -1,4 +1,6 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
+
+from __future__ import print_function
 
 import sys
 import os