diff --git a/management/univention-directory-listener/src/change.c b/management/univention-directory-listener/src/change.c
index 0ea265725a..1b75b37723 100644
--- a/management/univention-directory-listener/src/change.c
+++ b/management/univention-directory-listener/src/change.c
@@ -311,8 +311,7 @@ int change_update_schema(univention_ldap_parameters_t *lp) {
        char *server_role;
 
        server_role = univention_config_get_string("server/role");
-
-       if (!strcmp(server_role, "domaincontroller_master")) {
+       if (server_role && !strcmp(server_role, "domaincontroller_master")) {
                free(server_role);
                return LDAP_SUCCESS;
        }