diff --git a/app/assets/javascripts/discourse/models/category.js.es6 b/app/assets/javascripts/discourse/models/category.js.es6
index 0e576a4b8f..faeaf1d926 100644
--- a/app/assets/javascripts/discourse/models/category.js.es6
+++ b/app/assets/javascripts/discourse/models/category.js.es6
@@ -85,6 +85,14 @@ const Category = RestModel.extend({
     return notificationLevel === NotificationLevels.MUTED;
   },
 
+  @discourseComputed("notification_level")
+  notificationLevelString(notificationLevel) {
+    // Get the key from the value
+    return Object.keys(NotificationLevels)
+      .find(key => NotificationLevels[key] === notificationLevel)
+      .toLowerCase();
+  },
+
   @discourseComputed("name")
   url() {
     return Discourse.getURL(`/c/${Category.slugFor(this)}/${this.id}`);
diff --git a/app/assets/javascripts/discourse/templates/components/categories-boxes.hbs b/app/assets/javascripts/discourse/templates/components/categories-boxes.hbs
index cd39c3751f..888eefce97 100644
--- a/app/assets/javascripts/discourse/templates/components/categories-boxes.hbs
+++ b/app/assets/javascripts/discourse/templates/components/categories-boxes.hbs
@@ -1,5 +1,5 @@
 {{#each categories as |c|}}
-  <div class='category category-box category-box-{{unbound c.slug}}' style={{border-color c.color}} data-category-id={{c.id}} data-notification-level={{c.notification_level}}
+  <div class='category category-box category-box-{{unbound c.slug}}' style={{border-color c.color}} data-category-id={{c.id}} data-notification-level={{c.notificationLevelString}}
    data-url={{c.url}}>
     <div class='category-box-inner'>
       <div class="category-logo">
@@ -28,7 +28,7 @@
         </div>
         {{#if c.isGrandParent}}
           {{#each c.subcategories as |subcategory|}}
-            <div data-category-id={{subcategory.id}} data-notification-level={{subcategory.notification_level}}  style={{border-color subcategory.color}} class="subcategory with-subcategories {{if subcategory.uploaded_logo.url 'has-logo' 'no-logo'}}">
+            <div data-category-id={{subcategory.id}} data-notification-level={{subcategory.notificationLevelString}}  style={{border-color subcategory.color}} class="subcategory with-subcategories {{if subcategory.uploaded_logo.url 'has-logo' 'no-logo'}}">
               <div class="subcategory-box-inner">
                 {{category-title-link tagName="h4" category=subcategory}}
                 {{#if subcategory.subcategories}}
diff --git a/app/assets/javascripts/discourse/templates/components/categories-only.hbs b/app/assets/javascripts/discourse/templates/components/categories-only.hbs
index d8280b5d73..ee0840bbe3 100644
--- a/app/assets/javascripts/discourse/templates/components/categories-only.hbs
+++ b/app/assets/javascripts/discourse/templates/components/categories-only.hbs
@@ -11,7 +11,7 @@
     </thead>
     <tbody aria-labelledby="categories-only-category">
       {{#each categories as |c|}}
-        <tr data-category-id={{c.id}} data-notification-level={{c.notification_level}} class="{{if c.description_excerpt 'has-description' 'no-description'}} {{if c.uploaded_logo.url 'has-logo' 'no-logo'}}">
+        <tr data-category-id={{c.id}} data-notification-level={{c.notificationLevelString}} class="{{if c.description_excerpt 'has-description' 'no-description'}} {{if c.uploaded_logo.url 'has-logo' 'no-logo'}}">
           <td class="category" style={{border-color c.color}}>
             {{category-title-link category=c}}
             {{#if c.description_excerpt}}
@@ -22,7 +22,7 @@
             {{#if c.isGrandParent}}
               <table class="category-list subcategories-with-subcategories">
                 {{#each c.subcategories as |subcategory|}}
-                  <tr data-category-id={{subcategory.id}} data-notification-level={{subcategory.notification_level}} class="{{if subcategory.description_excerpt 'has-description' 'no-description'}} {{if subcategory.uploaded_logo.url 'has-logo' 'no-logo'}}">
+                  <tr data-category-id={{subcategory.id}} data-notification-level={{subcategory.notificationLevelString}} class="{{if subcategory.description_excerpt 'has-description' 'no-description'}} {{if subcategory.uploaded_logo.url 'has-logo' 'no-logo'}}">
                     <td class="category" style={{border-color subcategory.color}}>
                       {{category-title-link tagName="h4" category=subcategory}}
                       {{#if subcategory.description_excerpt}}