diff --git a/defender/config.py b/defender/config.py
index d03610f..ae9298e 100644
--- a/defender/config.py
+++ b/defender/config.py
@@ -15,6 +15,8 @@ MOCK_REDIS = get_setting('DEFENDER_MOCK_REDIS', False)
 # see if the user has overridden the failure limit
 FAILURE_LIMIT = get_setting('DEFENDER_LOGIN_FAILURE_LIMIT', 3)
 
+LOCKOUT_BY_IP_USERNAME = get_setting('DEFENDER_LOCK_OUT_BY_IP_AND_USERNAME', False)
+
 # use a specific username field to retrieve from login POST data
 USERNAME_FORM_FIELD = get_setting('DEFENDER_USERNAME_FORM_FIELD', 'username')