diff --git a/ghost/admin/app/controllers/settings/design.js b/ghost/admin/app/controllers/settings/design.js
index d4351cdaca..09966974bd 100644
--- a/ghost/admin/app/controllers/settings/design.js
+++ b/ghost/admin/app/controllers/settings/design.js
@@ -171,7 +171,7 @@ export default Controller.extend({
         },
 
         downloadTheme(theme) {
-            let downloadURL = `${this.get('ghostPaths.apiRoot')}/themes/${theme.name}`;
+            let downloadURL = `${this.get('ghostPaths.apiRoot')}/themes/${theme.name}/download/`;
             let iframe = $('#iframeDownload');
 
             if (iframe.length === 0) {