Index: Queue.py
===================================================================
--- Queue.py	(revision 60906)
+++ Queue.py	(working copy)
@@ -192,7 +192,10 @@
 
     # Initialize the queue representation
     def _init(self, maxsize):
-        self.maxsize = maxsize
+        try:
+            self.maxsize = int(maxsize) # To change the maxsize it must acquire the mutex
+        except (TypeError, AttributeError, ValueError): # grumph
+            raise ValueError('maxsize should be an integer')
         self.queue = deque()
 
     def _qsize(self):