diff --git a/plugin/fugitive.vim b/plugin/fugitive.vim
index 459aab2..9a13fa7 100644
--- a/plugin/fugitive.vim
+++ b/plugin/fugitive.vim
@@ -271,6 +271,9 @@ function! s:configured_tree(git_dir) abort
       endif
     elseif filereadable(a:git_dir . '/gitdir')
       let worktree = fnamemodify(readfile(a:git_dir . '/gitdir')[0], ':h')
+      if worktree ==# '.'
+        unlet! worktree
+      endif
     endif
     if exists('worktree')
       let s:worktree_for_dir[a:git_dir] = worktree