diff --git a/README.md b/README.md
index d207a5c..ecb3512 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ NeoBundleInstall ocaml/vim-ocaml'
 
 " or use NeoBundleLazy
 NeoBundleLazy 'rgrinberg/vim-ocaml', {'autoload' : {'filetypes' :
-    \ ['ocaml', 'dune', 'opam', 'oasis', 'omake', 'ocamlbuild_tags', 'sexplib']}}
+    \ ['ocaml', 'ocamlinterface', 'ocamllex', 'dune', 'opam', 'oasis', 'omake', 'ocamlbuild_tags', 'sexplib']}}
 ```
 
 ## History
diff --git a/ftdetect/ocaml.vim b/ftdetect/ocaml.vim
index ecb8f43..002f6f0 100644
--- a/ftdetect/ocaml.vim
+++ b/ftdetect/ocaml.vim
@@ -1 +1 @@
-au BufNewFile,BufRead *.ml,*.mli,*.mll,*.mly,.ocamlinit,*.mlt,*.mlp,*.mlip,*.mli.cppo,*.ml.cppo setf ocaml
+au BufNewFile,BufRead *.ml,*.mly,.ocamlinit,*.mlt,*.mlp,*.ml.cppo setf ocaml
diff --git a/ftdetect/ocamlinterface.vim b/ftdetect/ocamlinterface.vim
new file mode 100644
index 0000000..d67c48d
--- /dev/null
+++ b/ftdetect/ocamlinterface.vim
@@ -0,0 +1 @@
+au BufNewFile,BufRead *.mli,*.mlip,*.mli.cppo setf ocamlinterface
diff --git a/ftdetect/ocamllex.vim b/ftdetect/ocamllex.vim
new file mode 100644
index 0000000..cf35fd2
--- /dev/null
+++ b/ftdetect/ocamllex.vim
@@ -0,0 +1 @@
+au BufNewFile,BufRead *.mll setf ocamllex
diff --git a/ftplugin/ocamlinterface.vim b/ftplugin/ocamlinterface.vim
new file mode 100644
index 0000000..d7e2ae0
--- /dev/null
+++ b/ftplugin/ocamlinterface.vim
@@ -0,0 +1,12 @@
+" Language:    OCaml Interface
+" Maintainer:  vim-ocaml maintainers
+" URL:         http://www.github.com/ocaml/vim-ocaml
+
+if exists("b:did_ftplugin")
+  finish
+endif
+
+runtime! ftplugin/ocaml.vim
+runtime! ftplugin/ocaml_*.vim ftplugin/ocaml/*.vim
+
+" vim:sw=2 fdm=indent
diff --git a/ftplugin/ocamllex.vim b/ftplugin/ocamllex.vim
new file mode 100644
index 0000000..f6b12f9
--- /dev/null
+++ b/ftplugin/ocamllex.vim
@@ -0,0 +1,12 @@
+" Language:    OCamlLex
+" Maintainer:  vim-ocaml maintainers
+" URL:         http://www.github.com/ocaml/vim-ocaml
+
+if exists("b:did_ftplugin")
+  finish
+endif
+
+runtime! ftplugin/ocaml.vim
+runtime! ftplugin/ocaml_*.vim ftplugin/ocaml/*.vim
+
+" vim:sw=2 fdm=indent