1 files changed, 1 insertions, 0 deletions

diff --git a/ast.h b/ast.h
index cd5bf6b3f5..ad614e98fe 100644
--- a/ast.h
+++ b/ast.h
@@ -1,3 +1,4 @@
+/* -*- c++ -*- */
 /*
  * Copyright © 2009 Intel Corporation
  *