diff --git a/gclient b/gclient
index 798b2d8d7..5ef06e462 100755
--- a/gclient
+++ b/gclient
@@ -9,4 +9,4 @@ if [[ "#grep#fetch#cleanup#diff#" != *"#$1#"* ]]; then
   "$base_dir"/update_depot_tools "$@"
 fi
 
-PYTHONDONTWRITEBYTECODE=1 exec python "$base_dir/gclient.py" "$@"
+PYTHONDONTWRITEBYTECODE=1 exec python2.7 "$base_dir/gclient.py" "$@"
diff --git a/gclient.py b/gclient.py
index 00bb95d70..d3501910c 100755
--- a/gclient.py
+++ b/gclient.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2.7
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
diff --git a/git_cl.py b/git_cl.py
index c212300f5..8fa8a30b1 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2.7
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
diff --git a/tests/gclient_smoketest.py b/tests/gclient_smoketest.py
index 50e7fd72c..af7205e11 100755
--- a/tests/gclient_smoketest.py
+++ b/tests/gclient_smoketest.py
@@ -517,7 +517,7 @@ class GClientSmokeGIT(GClientSmokeBase):
         ('running', self.root_dir),                 # pre-deps hook
         ('running', self.root_dir),                 # pre-deps hook (fails)
     ]
-    expected_stderr = ("Error: Command '/usr/bin/python -c import sys; "
+    expected_stderr = ("Error: Command '/usr/bin/python2.7 -c import sys; "
                        "sys.exit(1)' returned non-zero exit status 1 in %s\n"
                        % self.root_dir)
     stdout, stderr, retcode = self.gclient(['sync', '--deps', 'mac', '--jobs=1',