diff --git a/brewman/views/services/login.py b/brewman/views/services/login.py
index 215aa8f4..df32f165 100644
--- a/brewman/views/services/login.py
+++ b/brewman/views/services/login.py
@@ -74,7 +74,7 @@ def check_client(client, otp, client_name, user):
     if client.enabled or outside_login_allowed:
         return True, client, None
 
-    if not client.otp is None:
+    if client.otp is None:
         response = Response("Client is Forbidden")
         response.status_int = 403
         return False, None, response