diff --git a/plugin/fugitive.vim b/plugin/fugitive.vim
index aaa736c..2aadaeb 100644
--- a/plugin/fugitive.vim
+++ b/plugin/fugitive.vim
@@ -2175,7 +2175,10 @@ augroup fugitive_files
   autocmd BufWriteCmd fugitive://**//[0-3]/**          exe s:BufWriteIndexFile()
   autocmd BufReadCmd  fugitive://**//[0-9a-f][0-9a-f]* exe s:BufReadObject()
   autocmd FileReadCmd fugitive://**//[0-9a-f][0-9a-f]* exe s:FileRead()
-  autocmd FileType git       call s:JumpInit()
+  autocmd FileType git
+        \ if exists('b:git_dir') |
+        \  call s:JumpInit() |
+        \ endif
 augroup END
 
 " }}}1