diff --git a/microsoftgraph/client.py b/microsoftgraph/client.py
index 9c9525b..73a1135 100644
--- a/microsoftgraph/client.py
+++ b/microsoftgraph/client.py
@@ -57,7 +57,7 @@ def authorization_url(self, redirect_uri, scope, state=None):
         }
 
         if state:
-            params['state'] = None
+            params['state'] = state
         if self.office365:
             response = self.OFFICE365_AUTHORITY_URL + self.OFFICE365_AUTH_ENDPOINT + urlencode(params)
         else: