diff --git a/share/base.css.in b/share/base.css.in
index 59ac4ed..ddfc284 100644
--- a/share/base.css.in
+++ b/share/base.css.in
@@ -1,5 +1,4 @@
-/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
-/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab filetype=css: */
 /* Demo CSS for pdf2htmlEX */
 /* Copyright 2012,2013 Lu Wang <coolwanglu@gmail.com> */
 /* Part 1: Web Page Layout: Free to modify, except for a few of them which are required by pdf2htmlEX.js, see the comments */
diff --git a/src/css_class_names.cmakelists.txt b/src/css_class_names.cmakelists.txt
index 0158e44..6b604e6 100644
--- a/src/css_class_names.cmakelists.txt
+++ b/src/css_class_names.cmakelists.txt
@@ -1,3 +1,4 @@
+# vim: filetype=cmake :
 # CSS class names
 
 # Note
diff --git a/src/util/css_const.h.in b/src/util/css_const.h.in
index 260f898..a1803c7 100644
--- a/src/util/css_const.h.in
+++ b/src/util/css_const.h.in
@@ -1,3 +1,4 @@
+/* vim: filetype=cpp : */
 /*
  * css_const.h
  *