diff --git a/ckanext/ozwillo_pyoidc/oidc.py b/ckanext/ozwillo_pyoidc/oidc.py
index 3295a2d..e1908ab 100755
--- a/ckanext/ozwillo_pyoidc/oidc.py
+++ b/ckanext/ozwillo_pyoidc/oidc.py
@@ -116,7 +116,10 @@ def create_client(**kwargs):
         try:
             args[param] = kwargs[param]
         except KeyError:
-            args[param] = kwargs['client_registration'][param]
+            try:
+                args[param] = kwargs['client_registration'][param]
+            except KeyError:
+                pass
         else:
             _key_set.discard(param)