diff --git a/messaging/rabbitmq_exchange.py b/messaging/rabbitmq_exchange.py
index 5f6c83c10e6..aed808ed569 100644
--- a/messaging/rabbitmq_exchange.py
+++ b/messaging/rabbitmq_exchange.py
@@ -94,7 +94,8 @@ options:
     arguments:
         description:
             - extra arguments for exchange. If defined this argument is a key/value dictionary
-        required: false        
+        required: false
+        default: {}
 '''
 
 EXAMPLES = '''