diff --git a/shade/task_manager.py b/shade/task_manager.py
index e903f6738..d2dce731d 100644
--- a/shade/task_manager.py
+++ b/shade/task_manager.py
@@ -72,7 +72,7 @@ class Task(object):
         self._traceback = tb
         self._finished.set()
 
-    def wait(self, raw):
+    def wait(self, raw=False):
         self._finished.wait()
 
         if self._exception: