diff --git a/mistral/engine/engine_server.py b/mistral/engine/engine_server.py
index cc72ad873..c843da784 100644
--- a/mistral/engine/engine_server.py
+++ b/mistral/engine/engine_server.py
@@ -84,7 +84,7 @@ class EngineServer(service_base.MistralService):
 
         :param rpc_ctx: RPC request context.
         :param wf_identifier: Workflow definition identifier.
-        :param wf_namespace: Workflow definition identifier.
+        :param wf_namespace: Workflow namespace.
         :param wf_input: Workflow input.
         :param wf_ex_id: Workflow execution id. If passed, it will be set
             in the new execution object.
diff --git a/mistral/rpc/clients.py b/mistral/rpc/clients.py
index d69f68697..3760f7bf7 100644
--- a/mistral/rpc/clients.py
+++ b/mistral/rpc/clients.py
@@ -122,7 +122,6 @@ class EngineClient(eng.Engine):
         """Starts workflow sending a request to engine over RPC.
 
         :param wf_identifier: Workflow identifier.
-        :param wf_namespace Workflow namespace.
         :param wf_namespace: Workflow namespace.
         :param wf_input: Workflow input data as a dictionary.
         :param wf_ex_id: Workflow execution id. If passed, it will be set