diff -Naur sssd-1.13.3.old/src/providers/ldap/sdap.c sssd-1.13.3/src/providers/ldap/sdap.c
--- sssd-1.13.3.old/src/providers/ldap/sdap.c	2015-12-15 16:49:12.000000000 -0300
+++ sssd-1.13.3/src/providers/ldap/sdap.c	2016-01-20 17:47:05.064954941 -0300
@@ -1337,6 +1337,8 @@
         ret = sysdb_attrs_get_uint32_t(rootdse,
                                        SDAP_ROOTDSE_ATTR_AD_VERSION,
                                        &dc_level);
+
+		opts->dc_functional_level = -1;
         if (ret == EOK) {
             /* Validate that the DC level matches an expected value */
             switch(dc_level) {