diff --git a/ldapcherry/backend/backendLdap.py b/ldapcherry/backend/backendLdap.py
index 618e296..c6c9586 100644
--- a/ldapcherry/backend/backendLdap.py
+++ b/ldapcherry/backend/backendLdap.py
@@ -28,7 +28,7 @@
 
     def auth(self, username, password):
 
-        binddn = get_user(username)
+        binddn = self.get_user(username)
         if binddn:
             ldap_client = self._connect()
             try: