diff --git a/plugin/vinegar.vim b/plugin/vinegar.vim
index dde3ac1..bdb81d6 100644
--- a/plugin/vinegar.vim
+++ b/plugin/vinegar.vim
@@ -48,7 +48,7 @@ function! s:opendir(cmd) abort
   elseif expand('%') =~# '^$\|^term:[\/][\/]'
     execute a:cmd '.'
   else
-    execute a:cmd '%:h'
+    execute a:cmd '%:h' . s:slash()
     call s:seek(expand('#:t'))
   endif
 endfunction