diff --git a/lib/ansible/modules/system/authorized_key.py b/lib/ansible/modules/system/authorized_key.py
index 1df21b4c76..dfb0b1b207 100644
--- a/lib/ansible/modules/system/authorized_key.py
+++ b/lib/ansible/modules/system/authorized_key.py
@@ -33,12 +33,10 @@ options:
     description:
       - The username on the remote host whose authorized_keys file will be modified
     required: true
-    default: null
   key:
     description:
       - The SSH public key(s), as a string or (since 1.9) url (https://github.com/username.keys)
     required: true
-    default: null
   path:
     description:
       - Alternate path to the authorized_keys file