diff --git a/autoload/fugitive.vim b/autoload/fugitive.vim
index 06f06de..4bb11d8 100644
--- a/autoload/fugitive.vim
+++ b/autoload/fugitive.vim
@@ -508,7 +508,7 @@ function! fugitive#Route(object, ...) abort
     let prefix = matchstr(a:object, '^[~$]\i*')
     let owner = expand(prefix)
     return s:PlatformSlash((len(owner) ? owner : prefix) . strpart(a:object, len(prefix)))
-  elseif s:Slash(a:object) =~# '^/\|^\%(\a\a\+:\).*\%(//\|::\)' || (has('win32') ? '^\a:/' : '')
+  elseif s:Slash(a:object) =~# '^$\|^/\|^\%(\a\a\+:\).*\%(//\|::\)' . (has('win32') ? '\|^\a:/' : '')
     return s:PlatformSlash(a:object)
   elseif s:Slash(a:object) =~# '^\.\.\=\%(/\|$\)'
     return s:PlatformSlash(simplify(getcwd() . '/' . a:object))
@@ -534,7 +534,7 @@ function! fugitive#Route(object, ...) abort
     else
       let f = dir . f
     endif
-  elseif rev =~# '^$\|^:/$'
+  elseif rev ==# ':/'
     let f = base
   elseif rev =~# '^\.\%(/\|$\)'
     let f = base . rev[1:-1]
diff --git a/plugin/fugitive.vim b/plugin/fugitive.vim
index 3db9f7a..c33e368 100644
--- a/plugin/fugitive.vim
+++ b/plugin/fugitive.vim
@@ -44,7 +44,7 @@ function! FugitiveReal(...) abort
 endfunction
 
 function! FugitiveRoute(...) abort
-  return fugitive#Route(a:0 ? a:1 : '', FugitiveGitDir(a:0 > 1 ? a:2 : -1))
+  return fugitive#Route(a:0 ? a:1 : ':/', FugitiveGitDir(a:0 > 1 ? a:2 : -1))
 endfunction
 
 function! FugitivePath(...) abort