diff --git a/ironic/api/controllers/v1/types.py b/ironic/api/controllers/v1/types.py
index 31eb4cb72a..aa9c9c6d7e 100644
--- a/ironic/api/controllers/v1/types.py
+++ b/ironic/api/controllers/v1/types.py
@@ -156,7 +156,7 @@ class MultiType(wtypes.UserType):
 
     Used for validating that a value is an instance of one of the types.
 
-    :param *types: Variable-length list of types.
+    :param types: Variable-length list of types.
 
     """
     def __init__(self, *types):
diff --git a/ironic/conductor/task_manager.py b/ironic/conductor/task_manager.py
index a8321bb1ae..79e4d6d308 100644
--- a/ironic/conductor/task_manager.py
+++ b/ironic/conductor/task_manager.py
@@ -205,8 +205,8 @@ class TaskManager(object):
 
         :param _on_error_method: a callable object, it's first parameter
             should accept the Exception object that was raised.
-        :param *args: additional args passed to the callable object.
-        :param **kwargs: additional kwargs passed to the callable object.
+        :param args: additional args passed to the callable object.
+        :param kwargs: additional kwargs passed to the callable object.
 
         """
         self._on_error_method = _on_error_method
diff --git a/ironic/drivers/base.py b/ironic/drivers/base.py
index 520069b77e..ea2c075033 100644
--- a/ironic/drivers/base.py
+++ b/ironic/drivers/base.py
@@ -378,7 +378,7 @@ class VendorInterface(object):
         :param kwargs: info for action.
         :raises: UnsupportedDriverExtension if 'method' can not be mapped to
                  the supported interfaces.
-        :raises: InvalidParameterValue if **kwargs does not contain 'method'.
+        :raises: InvalidParameterValue if kwargs does not contain 'method'.
         :raises: MissingParameterValue
         """
 
@@ -391,7 +391,7 @@ class VendorInterface(object):
 
         :raises: UnsupportedDriverExtension if 'method' can not be mapped to
                  the supported interfaces.
-        :raises: InvalidParameterValue if **kwargs does not contain 'method'.
+        :raises: InvalidParameterValue if kwargs does not contain 'method'.
         :raises: MissingParameterValue when a required parameter is missing
         """
 
diff --git a/ironic/drivers/modules/ipmitool.py b/ironic/drivers/modules/ipmitool.py
index 9333ac51e7..5cc60a58d1 100644
--- a/ironic/drivers/modules/ipmitool.py
+++ b/ironic/drivers/modules/ipmitool.py
@@ -868,7 +868,7 @@ class VendorPassthru(base.VendorInterface):
 
         :param task: a task from TaskManager.
         :param kwargs: info for action.
-        :raises: InvalidParameterValue if **kwargs does not contain 'method',
+        :raises: InvalidParameterValue if kwargs does not contain 'method',
                  'method' is not supported or a byte string is not given for
                  'raw_bytes'.
         :raises: MissingParameterValue if a required parameter is missing.
diff --git a/ironic/drivers/utils.py b/ironic/drivers/utils.py
index edaa84b1e7..64fbfe06e6 100644
--- a/ironic/drivers/utils.py
+++ b/ironic/drivers/utils.py
@@ -69,7 +69,7 @@ class MixinVendorInterface(base.VendorInterface):
 
         :raises: UnsupportedDriverExtension if 'method' can not be mapped to
                  the supported interfaces.
-        :raises: InvalidParameterValue if **kwargs does not contain 'method'.
+        :raises: InvalidParameterValue if kwargs does not contain 'method'.
         :raisee: MissingParameterValue if missing parameters in kwargs.
 
         """
@@ -83,7 +83,7 @@ class MixinVendorInterface(base.VendorInterface):
 
         :raises: UnsupportedDriverExtension if 'method' can not be mapped to
                  the supported interfaces.
-        :raises: MissingParameterValue if **kwargs does not contain 'method'.
+        :raises: MissingParameterValue if kwargs does not contain 'method'.
 
         """
         route = self._map(**kwargs)