f++;
}
- if (!filter_server_headers && !list_is_empty(csp->config->ordered_client_headers))
+ if (!filter_server_headers &&
+ !list_is_empty(csp->config->ordered_client_headers) &&
+ csp->headers->first->str != NULL)
{
enforce_header_order(csp->headers, csp->config->ordered_client_headers);
}