diff --git a/ftdetect/markdown.vim b/ftdetect/markdown.vim
index 1c5a36a..4e72365 100644
--- a/ftdetect/markdown.vim
+++ b/ftdetect/markdown.vim
@@ -1,4 +1,4 @@
-autocmd BufNewFile,BufRead *.markdown,*.md,*.mdown,*.mkd,*.mkdn
+autocmd BufNewFile,BufRead *.markdown,*.md,*.mdown,*.mkd,*.mkdn,*.mdwn
       \ if &ft =~# '^\%(conf\|modula2\)$' |
       \   set ft=markdown |
       \ else |