--- lockfile-0.9.1/lockfile/__init__.py.orig	2012-02-02 13:32:51.133789612 +0100
+++ lockfile-0.9.1/lockfile/__init__.py	2012-02-02 13:33:13.024241010 +0100
@@ -167,7 +167,7 @@
             t = threading.current_thread()
             # Thread objects in Python 2.4 and earlier do not have ident
             # attrs.  Worm around that.
-            ident = getattr(t, "ident", hash(t))
+            ident = getattr(t, "ident", hash(t)) or hash(t)
             self.tname = "-%x" % (ident & 0xffffffff)
         else:
             self.tname = ""