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--- a/Allura/allura/lib/app_globals.py
+++ b/Allura/allura/lib/app_globals.py
@@ -27,6 +27,7 @@
 import datetime
 from urllib import urlencode
 from subprocess import Popen, PIPE
+import os
 
 import activitystream
 import pkg_resources
@@ -209,6 +210,8 @@
             statslisteners.append(ep())
         self.statsUpdater = PostEvent(statslisteners)
 
+        self.tmpdir = os.getenv('TMPDIR', '/tmp')
+
     @LazyProperty
     def spam_checker(self):
         """Return a SpamFilter implementation.