diff --git a/app/assets/javascripts/discourse/templates/components/toggle-summary.js.handlebars b/app/assets/javascripts/discourse/templates/components/toggle-summary.js.handlebars
index 622399c0c54..9f52cad8f27 100644
--- a/app/assets/javascripts/discourse/templates/components/toggle-summary.js.handlebars
+++ b/app/assets/javascripts/discourse/templates/components/toggle-summary.js.handlebars
@@ -8,5 +8,5 @@
     <p>{{{i18n summary.description count="topic.posts_count"}}}</p>
   {{/if}}
 
-  <button class='btn' {{action toggleSummary}}>{{i18n summary.enable}}</button>
+  <button class='btn btn-primary' {{action toggleSummary}}>{{i18n summary.enable}}</button>
 {{/if}}