diff --git a/lib/ansible/modules/cloud/webfaction/webfaction_app.py b/lib/ansible/modules/cloud/webfaction/webfaction_app.py
index 258c3e627a..8d7512ef82 100644
--- a/lib/ansible/modules/cloud/webfaction/webfaction_app.py
+++ b/lib/ansible/modules/cloud/webfaction/webfaction_app.py
@@ -82,7 +82,6 @@ options:
     machine:
         description:
             - The machine name to use (optional for accounts with only one machine)
-        default: False
 
 '''
 
@@ -116,7 +115,7 @@ def main():
             port_open=dict(required=False, type='bool', default=False),
             login_name=dict(required=True),
             login_password=dict(required=True, no_log=True),
-            machine=dict(required=False, default=False),
+            machine=dict(required=False, default=None),
         ),
         supports_check_mode=True
     )
diff --git a/lib/ansible/modules/cloud/webfaction/webfaction_db.py b/lib/ansible/modules/cloud/webfaction/webfaction_db.py
index be40f32cbb..332ee27dd9 100644
--- a/lib/ansible/modules/cloud/webfaction/webfaction_db.py
+++ b/lib/ansible/modules/cloud/webfaction/webfaction_db.py
@@ -67,7 +67,6 @@ options:
     machine:
         description:
             - The machine name to use (optional for accounts with only one machine)
-        default: false
 '''
 
 EXAMPLES = '''
@@ -106,7 +105,7 @@ def main():
             password=dict(required=False, default=None, no_log=True),
             login_name=dict(required=True),
             login_password=dict(required=True, no_log=True),
-            machine=dict(required=False, default=False),
+            machine=dict(required=False, default=None),
         ),
         supports_check_mode=True
     )
diff --git a/lib/ansible/modules/cloud/webfaction/webfaction_domain.py b/lib/ansible/modules/cloud/webfaction/webfaction_domain.py
index 118572f13a..473caf47d8 100644
--- a/lib/ansible/modules/cloud/webfaction/webfaction_domain.py
+++ b/lib/ansible/modules/cloud/webfaction/webfaction_domain.py
@@ -93,7 +93,7 @@ def main():
         argument_spec=dict(
             name=dict(required=True),
             state=dict(required=False, choices=['present', 'absent'], default='present'),
-            subdomains=dict(required=False, default=[]),
+            subdomains=dict(required=False, default=[], type='list'),
             login_name=dict(required=True),
             login_password=dict(required=True, no_log=True),
         ),