diff --git a/messaging/rabbitmq_exchange.py b/messaging/rabbitmq_exchange.py
index a2e9d2da9db..6f3ce143c4a 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 = '''