diff --git a/rendernode.py b/rendernode.py
index f61a986..d762b73 100644
--- a/rendernode.py
+++ b/rendernode.py
@@ -136,7 +136,7 @@ class RenderNode(object):
             pool = multiprocessing.Pool(processes=procs,initializer=pool_initializer,initargs=(self,))
             #warm up the pool so it reports all the worker id's
             if logging.getLogger().level >= 10:
-                pool.map_(bool,xrange(multiprocessing.cpu_count()),1)
+                pool.map(bool,xrange(multiprocessing.cpu_count()),1)
             else:
                 pool.map_async(bool,xrange(multiprocessing.cpu_count()),1)