diff --git a/autoload/quickrun/module.vim b/autoload/quickrun/module.vim
index 0ed5c7d..2e3079d 100644
--- a/autoload/quickrun/module.vim
+++ b/autoload/quickrun/module.vim
@@ -33,7 +33,7 @@ function! s:templates.runner.run(commands, input, session)
   throw 'quickrun: A runner should implements run()'
 endfunction
 function! s:templates.runner.shellescape(str)
-  return shellescape(a:str)
+  return a:str =~ '\s' ? shellescape(a:str) : a:str
 endfunction

 " Template of outputter.  {{{2