diff --git a/conf/ldapcherry.ini b/conf/ldapcherry.ini
index b412497..4415cf5 100644
--- a/conf/ldapcherry.ini
+++ b/conf/ldapcherry.ini
@@ -78,6 +78,7 @@ ldap.checkcert = 'off'
 ldap.user_filter_tmpl = '(uid=%(username)s)'
 ldap.group_filter_tmpl = '(member=%(username)s)'
 ldap.search_filter_tmpl = '(|(uid=%(searchstring)s*)(sn=%(searchstring)s*))'
+ldap.objectclasses = 'top, person, organizationalPerson, user'
 ldap.timeout = 1
 
 
diff --git a/ldapcherry/backend/backendLdap.py b/ldapcherry/backend/backendLdap.py
index 5c17f92..94a89a4 100644
--- a/ldapcherry/backend/backendLdap.py
+++ b/ldapcherry/backend/backendLdap.py
@@ -28,6 +28,7 @@ class Backend(ldapcherry.backend.Backend):
         self.user_filter_tmpl = self.get_param('user_filter_tmpl')
         self.group_filter_tmpl = self.get_param('group_filter_tmpl')
         self.search_filter_tmpl = self.get_param('search_filter_tmpl')
+        self.objectclasses = self.get_param('objectclasses')
         self.attrlist = []
         for a in attrslist:
             try:
diff --git a/tests/cfg/ldapcherry.ini b/tests/cfg/ldapcherry.ini
index b15b8f5..18ff3d7 100644
--- a/tests/cfg/ldapcherry.ini
+++ b/tests/cfg/ldapcherry.ini
@@ -78,6 +78,7 @@ ldap.checkcert = 'off'
 ldap.user_filter_tmpl = '(uid=%(username)s)'
 ldap.group_filter_tmpl = '(member=%(userdn)s)'
 ldap.search_filter_tmpl = '(|(uid=%(searchstring)s*)(sn=%(searchstring)s*))'
+ldap.objectclasses = 'top, person, organizationalPerson, user'
 ldap.timeout = 1
 
 ad.module = 'ldapcherry.backend.backendSamba4'
diff --git a/tests/test_BackendLdap.py b/tests/test_BackendLdap.py
index 0fc4c72..7333b96 100644
--- a/tests/test_BackendLdap.py
+++ b/tests/test_BackendLdap.py
@@ -26,6 +26,7 @@ cfg = {
 'user_filter_tmpl'   : '(uid=%(username)s)',
 'group_filter_tmpl'  : '(member=%(userdn)s)',
 'search_filter_tmpl' : '(|(uid=%(searchstring)s*)(sn=%(searchstring)s*))',
+'objectclasses'      : 'top, person, organizationalPerson, user',
 }
 
 cherrypy.log.error = syslog_error