diff --git a/lib/module.js b/lib/module.js
index d6ebbeb5..8f18c56e 100644
--- a/lib/module.js
+++ b/lib/module.js
@@ -38,7 +38,7 @@ module.exports = function (moduleOptions) {
 function processRoutes (options) {
   this.nuxt.hook('generate:extendRoutes', (routes) => {
     for (const route of routes) {
-      if (route.route !== '/amp' && route.route.indexOf('/amp/') !== 0) {
+      if (route.route && route.route !== '/amp' && route.route.indexOf('/amp/') !== 0) {
         routes.push({
           ...route,
           route: '/amp' + route.route