diff --git a/docs/source/tour.rst b/docs/source/tour.rst
index 74f78f4..8d82526 100644
--- a/docs/source/tour.rst
+++ b/docs/source/tour.rst
@@ -220,7 +220,7 @@ Want `CORS <https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/>`_ ?
 
 The default parameters used by **Responder** are restrictive by default, so you'll need to explicitly enable particular origins, methods, or headers, in order for browsers to be permitted to use them in a Cross-Domain context.
 
-In order to set custom parameters, you need to pass the ``cors_params`` argument, a dictionnary containing the following entries :
+In order to set custom parameters, you need to set the ``cors_params`` argument of ``api``, a dictionnary containing the following entries:
 
 * ``allow_origins`` - A list of origins that should be permitted to make cross-origin requests. eg. ``['https://example.org', 'https://www.example.org']``. You can use ``['*']`` to allow any origin.
 * ``allow_origin_regex`` - A regex string to match against origins that should be permitted to make cross-origin requests. eg. ``'https://.*\.example\.org'``.
diff --git a/responder/api.py b/responder/api.py
index d40cfd6..00a95e9 100644
--- a/responder/api.py
+++ b/responder/api.py
@@ -64,10 +64,7 @@ class API:
         enable_hsts=False,
         docs_route=None,
         cors=False,
-        cors_params=None,
     ):
-        if cors_params is None:
-            cors_params = DEFAULT_CORS_PARAMS
 
         self.secret_key = secret_key
         self.title = title
@@ -87,7 +84,7 @@ class API:
 
         self.hsts_enabled = enable_hsts
         self.cors = cors
-        self.cors_params = cors_params
+        self.cors_params = DEFAULT_CORS_PARAMS
         # Make the static/templates directory if they don't exist.
         for _dir in (self.static_dir, self.templates_dir):
             os.makedirs(_dir, exist_ok=True)