diff --git a/ftdetect/purescript.vim b/ftdetect/purescript.vim
index fd374f7..5e07496 100644
--- a/ftdetect/purescript.vim
+++ b/ftdetect/purescript.vim
@@ -1,2 +1,2 @@
 au BufNewFile,BufRead *.purs setf purescript
-au FileType purescript let &l:commentstring='{--%s--}'
+au FileType purescript let &l:commentstring='--%s'