diff --git a/configuration/ldap/ldap_config.py b/configuration/ldap/ldap_config.py
index 52d7238..1ed599f 100644
--- a/configuration/ldap/ldap_config.py
+++ b/configuration/ldap/ldap_config.py
@@ -60,16 +60,16 @@ AUTH_LDAP_GROUP_SEARCH = LDAPSearch(AUTH_LDAP_GROUP_SEARCH_BASEDN, ldap.SCOPE_SU
 AUTH_LDAP_GROUP_TYPE = _import_group_type(environ.get('AUTH_LDAP_GROUP_TYPE', 'GroupOfNamesType'))
 
 # Define a group required to login.
-AUTH_LDAP_REQUIRE_GROUP = os.environ.get('AUTH_LDAP_REQUIRE_GROUP_DN')
+AUTH_LDAP_REQUIRE_GROUP = environ.get('AUTH_LDAP_REQUIRE_GROUP_DN')
 
 # Define special user types using groups. Exercise great caution when assigning superuser status.
 AUTH_LDAP_USER_FLAGS_BY_GROUP = {}
 
 if AUTH_LDAP_REQUIRE_GROUP is not None:
     AUTH_LDAP_USER_FLAGS_BY_GROUP = {
-        "is_active": os.environ.get('AUTH_LDAP_REQUIRE_GROUP_DN', ''),
-        "is_staff": os.environ.get('AUTH_LDAP_IS_ADMIN_DN', ''),
-        "is_superuser": os.environ.get('AUTH_LDAP_IS_SUPERUSER_DN', '')
+        "is_active": environ.get('AUTH_LDAP_REQUIRE_GROUP_DN', ''),
+        "is_staff": environ.get('AUTH_LDAP_IS_ADMIN_DN', ''),
+        "is_superuser": environ.get('AUTH_LDAP_IS_SUPERUSER_DN', '')
     }
 
 # For more granular permissions, we can map LDAP groups to Django groups.