diff --git a/bin/gdbserver/.dir-locals.el b/bin/gdbserver/.dir-locals.el
new file mode 100644
index 0000000000000000000000000000000000000000..7f1ebfd9eebccf48f670e6840c6ec15a8df3b479
--- /dev/null
+++ b/bin/gdbserver/.dir-locals.el
@@ -0,0 +1,9 @@
+;; Copyright 2017 The Fuchsia Authors. All rights reserved.
+;; Use of this source code is governed by a BSD-style license that can be
+;; found in the LICENSE file.
+
+(
+ ;; Expand tabs as spaces.
+ (c-mode . ((indent-tabs-mode . nil)))
+ (c++-mode . ((indent-tabs-mode . nil)))
+)