diff -r 517de1983677 -r 0be3805cade1 Lib/test/test_urllib.py
--- a/Lib/test/test_urllib.py	Thu Apr 17 12:30:14 2014 +0200
+++ b/Lib/test/test_urllib.py	Thu Apr 17 12:03:48 2014 -0400
@@ -629,7 +629,7 @@
         do_not_quote = '' .join(["ABCDEFGHIJKLMNOPQRSTUVWXYZ",
                                  "abcdefghijklmnopqrstuvwxyz",
                                  "0123456789",
-                                 "_.-"])
+                                 "_.-~"])
         result = urllib.parse.quote(do_not_quote)
         self.assertEqual(do_not_quote, result,
                          "using quote(): %r != %r" % (do_not_quote, result))
diff -r 517de1983677 -r 0be3805cade1 Lib/urllib/parse.py
--- a/Lib/urllib/parse.py	Thu Apr 17 12:30:14 2014 +0200
+++ b/Lib/urllib/parse.py	Thu Apr 17 12:03:48 2014 -0400
@@ -623,7 +623,7 @@
 _ALWAYS_SAFE = frozenset(b'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
                          b'abcdefghijklmnopqrstuvwxyz'
                          b'0123456789'
-                         b'_.-')
+                         b'_.-~')
 _ALWAYS_SAFE_BYTES = bytes(_ALWAYS_SAFE)
 _safe_quoters = {}