diff --git a/Lib/urllib.py b/Lib/urllib.py
index 55725807017..3175199a96a 100644
--- a/Lib/urllib.py
+++ b/Lib/urllib.py
@@ -556,7 +556,7 @@ def redirect_internal(self, url, fp, errcode, errmsg, headers, data):
         void = fp.read()
         fp.close()
         # In case the server sent a relative URL, join with original:
-        newurl = basejoin("http:" + url, newurl)
+        newurl = basejoin(self.type + ":" + url, newurl)
         if data is None:
             return self.open(newurl)
         else: