diff --git a/ftdetect/dune.vim b/ftdetect/dune.vim
index 7b81111..564d942 100644
--- a/ftdetect/dune.vim
+++ b/ftdetect/dune.vim
@@ -1 +1 @@
-au BufNewFile,BufRead jbuild,dune,dune-project,dune-workspace setf dune
+au BufNewFile,BufRead jbuild,dune,dune-project,dune-workspace,dune-file setf dune