diff --git a/messaging/rabbitmq_binding.py b/messaging/rabbitmq_binding.py
index 285670bf10e..83800ad6985 100644
--- a/messaging/rabbitmq_binding.py
+++ b/messaging/rabbitmq_binding.py
@@ -88,7 +88,8 @@ options:
     arguments:
         description:
             - extra arguments for exchange. If defined this argument is a key/value dictionary
-        required: false        
+        required: false
+        default: {}
 '''
 
 EXAMPLES = '''