diff --git a/compiler/cpp/src/thriftl.ll b/compiler/cpp/src/thriftl.ll
index 9392734..0b4e960 100644
--- a/compiler/cpp/src/thriftl.ll
+++ b/compiler/cpp/src/thriftl.ll
@@ -248,3 +248,6 @@
 
 
 %%
+
+/* vim: filetype=lex
+*/