diff --git a/examples/iothub_recv.py b/examples/iothub_recv.py
index dd1f6a5..03b04ae 100644
--- a/examples/iothub_recv.py
+++ b/examples/iothub_recv.py
@@ -10,9 +10,10 @@
 from azure.eventhub import EventData, EventHubClient, Offset
 
 import logging
+import os
 logger = logging.getLogger('azure.eventhub')
 
-CONNSTR = os.environ['IOTHUB_CONNECTION_STR']
+iot_connection_str = os.environ['IOTHUB_CONNECTION_STR']
 
 client = EventHubClient.from_iothub_connection_string(iot_connection_str, debug=True)
 receiver = client.add_receiver("$default", "0", operation='/messages/events')