New class syntax.
diff --git a/Lib/mutex.py b/Lib/mutex.py
index 38983fc..c939b1a 100644
--- a/Lib/mutex.py
+++ b/Lib/mutex.py
@@ -11,7 +11,7 @@
 # Of course, no multi-threading is implied -- hence the funny interface
 # for lock, where a function is called once the lock is aquired.
 #
-class mutex():
+class mutex:
 	#
 	# Create a new mutex -- initially unlocked
 	#