diff --git a/src/components/VinlottisPage.vue b/src/components/VinlottisPage.vue
index c4d071a..260c06c 100644
--- a/src/components/VinlottisPage.vue
+++ b/src/components/VinlottisPage.vue
@@ -73,6 +73,9 @@ export default {
   },
   computed: {
     notificationAllowed: function() {
+      if (!("PushManager" in window)) {
+        return false;
+      }
       return (
         Notification.permission !== "granted" ||
         !this.pushAllowed ||
diff --git a/src/mixins/ServiceWorkerMixin.js b/src/mixins/ServiceWorkerMixin.js
index d1af105..51f4e3e 100644
--- a/src/mixins/ServiceWorkerMixin.js
+++ b/src/mixins/ServiceWorkerMixin.js
@@ -4,8 +4,10 @@ var serviceWorkerRegistrationMixin = {
       console.log("Nettleseren din støtter ikke service-workers.");
       return;
     }
-    if (Notification.permission !== "granted") {
-      localStorage.removeItem("push");
+    if ("PushManager" in window) {
+      if (Notification.permission !== "granted") {
+        localStorage.removeItem("push");
+      }
     }
     this.registerPushListener();
     this.registerServiceWorker();