diff --git a/lib/index.js b/lib/index.js
index 891916800..6929936b3 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -49,6 +49,10 @@ module.exports = function(config_hash) {
 				}
 			} else {
 				Logger.logger.error({err: err}, 'unexpected error: @{!err.message}\n@{err.stack}')
+				if (!res.status || !res.send) {
+					Logger.logger.error('this is an error in express.js, please report this')
+					res.destroy()
+				}
 				if (calls == 1) {
 					res.status(500)
 					res.send({error: 'internal server error'})