diff --git a/plugins/callback/profile_tasks.py b/plugins/callback/profile_tasks.py
index 9433b96..6edb325 100644
--- a/plugins/callback/profile_tasks.py
+++ b/plugins/callback/profile_tasks.py
@@ -46,7 +46,7 @@ EXAMPLES = '''
 example: >
   To enable, add this to your ansible.cfg file in the defaults block
     [defaults]
-    callback_whitelist = profile_tasks
+    callback_whitelist = ansible.posix.profile_tasks
 sample output: >
 #
 #    TASK: [ensure messaging security group exists] ********************************
@@ -183,7 +183,7 @@ class CallbackModule(CallbackBase):
             )
 
         # Display the number of tasks specified or the default of 20
-        results = results[:self.task_output_limit]
+        results = list(results)[:self.task_output_limit]
 
         # Print the timings
         for uuid, result in results: