diff --git a/plugin/fugitive.vim b/plugin/fugitive.vim
index b20cbda..a026b6c 100644
--- a/plugin/fugitive.vim
+++ b/plugin/fugitive.vim
@@ -29,7 +29,7 @@ endfunction
 function! s:shellesc(arg) abort
   if a:arg =~ '^[A-Za-z0-9_/.-]\+$'
     return a:arg
-  elseif &shell =~# 'cmd'
+  elseif &shell =~# 'cmd' || &shell =~# 'power'
     return '"'.s:gsub(s:gsub(a:arg, '"', '""'), '\%', '"%"').'"'
   else
     return shellescape(a:arg)
@@ -951,7 +951,7 @@ function! s:Commit(args) abort
   try
     try
       execute cd.s:fnameescape(s:repo().tree())
-      if &shell =~# 'cmd'
+      if &shell =~# 'cmd' || &shell =~# 'power'
         let command = ''
         let old_editor = $GIT_EDITOR
         let $GIT_EDITOR = 'false'
@@ -2037,14 +2037,14 @@ function! s:ReplaceCmd(cmd,...) abort
   let prefix = ''
   try
     if a:0 && a:1 != ''
-      if &shell =~# 'cmd'
+      if &shell =~# 'cmd' || &shell =~# 'power'
         let old_index = $GIT_INDEX_FILE
         let $GIT_INDEX_FILE = a:1
       else
         let prefix = 'env GIT_INDEX_FILE='.s:shellesc(a:1).' '
       endif
     endif
-    if &shell =~# 'cmd'
+    if &shell =~# 'cmd' || &shell =~# 'power'
       let cmd_escape_char = &shellxquote == '(' ?  '^' : '^^^'
       call system('cmd /c "'.prefix.s:gsub(a:cmd,'[<>]', cmd_escape_char.'&').' > '.tmp.'"')
     else
@@ -2191,7 +2191,7 @@ function! s:BufWriteIndexFile() abort
     endif
     let info = old_mode.' '.sha1.' '.stage."\t".path
     call writefile([info],tmp)
-    if &shell =~# 'cmd'
+    if &shell =~# 'cmd' || &shell =~# 'power'
       let error = system('type '.s:gsub(tmp,'/','\\').'|'.s:repo().git_command('update-index','--index-info'))
     else
       let error = system(s:repo().git_command('update-index','--index-info').' < '.tmp)