diff -r 0acc5626a578 Modules/getpath.c
--- a/Modules/getpath.c	Tue Oct 23 22:50:11 2012 +0100
+++ b/Modules/getpath.c	Thu Oct 25 10:58:32 2012 +0200
@@ -699,6 +699,8 @@
      */
     bufsz = 0;
 
+    if (_rtpypath && _rtpypath[0] == '\0')
+        _rtpypath = NULL;
     if (_rtpypath) {
         size_t rtpypath_len;
         rtpypath = _Py_char2wchar(_rtpypath, &rtpypath_len);