Index: Lib/subprocess.py
===================================================================
--- Lib/subprocess.py	(revision 59074)
+++ Lib/subprocess.py	(working copy)
@@ -713,7 +713,8 @@
                 startupinfo.dwFlags |= STARTF_USESHOWWINDOW
                 startupinfo.wShowWindow = SW_HIDE
                 comspec = os.environ.get("COMSPEC", "cmd.exe")
-                args = comspec + " /c " + args
+                args = '"' + args + '"'
+                args = comspec + ' /c ' + args
                 if (GetVersion() >= 0x80000000 or
                         os.path.basename(comspec).lower() == "command.com"):
                     # Win9x, or using command.com on NT. We need to