diff -r dc9402c3db92 Python/pythonrun.c
--- a/Python/pythonrun.c	Tue Jul 31 03:25:28 2012 +0200
+++ b/Python/pythonrun.c	Wed Aug 01 09:15:12 2012 +0200
@@ -971,12 +971,16 @@ create_stdio(PyObject* io,
     Py_CLEAR(raw);
     Py_CLEAR(text);
 
-    newline = "\n";
 #ifdef MS_WINDOWS
     if (!write_mode) {
-        /* translate \r\n to \n for sys.stdin on Windows */
+        /* universal newline: translate \r\n to \n for sys.stdin on Windows */
         newline = NULL;
     }
+    else
+        /* translate \n to \r\n for sys.stdout and sys.stderr on Windows */
+        newline = "\r\n";
+#else
+    newline = "\n";
 #endif
 
     stream = _PyObject_CallMethodId(io, &PyId_TextIOWrapper, "OsssO",