diff --git a/packages/server/src/server.js b/packages/server/src/server.js
index e0dee2d5a..58915b58c 100644
--- a/packages/server/src/server.js
+++ b/packages/server/src/server.js
@@ -84,10 +84,10 @@ export default class Server {
       this.useMiddleware(modernMiddleware)
       this.useMiddleware(async (req, res, next) => {
         const name = req.modernMode ? 'modern' : 'client'
-        if (this.devMiddleware[name]) {
+        if (this.devMiddleware && this.devMiddleware[name]) {
           await this.devMiddleware[name](req, res)
         }
-        if (this.hotMiddleware[name]) {
+        if (this.hotMiddleware && this.hotMiddleware[name]) {
           await this.hotMiddleware[name](req, res)
         }
         next()