diff --git a/frappe/integrations/doctype/ldap_settings/ldap_settings.py b/frappe/integrations/doctype/ldap_settings/ldap_settings.py
index dba20afae5..348e3378a8 100644
--- a/frappe/integrations/doctype/ldap_settings/ldap_settings.py
+++ b/frappe/integrations/doctype/ldap_settings/ldap_settings.py
@@ -86,7 +86,7 @@ def authenticate_ldap_user(user=None, password=None):
 	try:
 		try:
 			# set TLS settings for secure connection
-			if self.ssl_tls_mode == 'StartTLS':
+			if settings.ssl_tls_mode == 'StartTLS':
 				conn.set_option(ldap.OPT_X_TLS_DEMAND, True)
 				if self.require_trusted_certificate == 'Yes':
 					conn.set_option(ldap.OPT_X_TLS_REQUIRE_CERT, ldap.OPT_X_TLS_DEMAND)