diff --git a/Lib/email/Generator.py b/Lib/email/Generator.py
index 9cce51c..6f17963 100644
--- a/Lib/email/Generator.py
+++ b/Lib/email/Generator.py
@@ -5,6 +5,7 @@
 """
 
 import re
+import sys
 import time
 import locale
 import random
@@ -356,11 +357,14 @@
 
 
 # Helper
+_width = len(repr(sys.maxint-1))
+_fmt = '%%0%dd' % _width
+
 def _make_boundary(text=None):
     # Craft a random boundary.  If text is given, ensure that the chosen
     # boundary doesn't appear in the text.
-    dp = locale.localeconv().get('decimal_point', '.')
-    boundary = ('=' * 15) + repr(random.random()).split(dp)[1] + '=='
+    token = random.randint(0, sys.maxint-1)
+    boundary = ('=' * 15) + (_fmt % token) + '=='
     if text is None:
         return boundary
     b = boundary
diff --git a/Lib/email/__init__.py b/Lib/email/__init__.py
index d9462bc..b5d8d72 100644
--- a/Lib/email/__init__.py
+++ b/Lib/email/__init__.py
@@ -4,7 +4,7 @@
 """A package for parsing, handling, and generating email messages.
 """
 
-__version__ = '2.5.2'
+__version__ = '2.5.3'
 
 __all__ = [
     'base64MIME',