diff --git a/lib/module.js b/lib/module.js
index 97267d714f..7f853ad203 100755
--- a/lib/module.js
+++ b/lib/module.js
@@ -64,7 +64,7 @@ class Module {
   }
 
   addServerMiddleware (middleware) {
-    this.options.serverMiddlewares.push(middleware)
+    this.options.serverMiddleware.push(middleware)
   }
 
   extendBuild (fn) {