Here's a fix for a typo; ngx_http_rdns_module.c -l709 static void dns_handler(ngx_resolver_ctx_t * rctx) {; +l709 static void dns_handler(ngx_resolver_ctx_t * rctx) { Posted at Nginx Forum: http://forum.nginx.org/read.php?2,243191,243213#msg-243213