diff --git a/addons/mass_mailing/static/src/js/wysiwyg.js b/addons/mass_mailing/static/src/js/wysiwyg.js
index a9b217fea40..e8741c62ee4 100644
--- a/addons/mass_mailing/static/src/js/wysiwyg.js
+++ b/addons/mass_mailing/static/src/js/wysiwyg.js
@@ -21,7 +21,7 @@ const MassMailingWysiwyg = Wysiwyg.extend({
         return res;
     },
 
-    toggleLinkTools(options) {
+    toggleLinkTools(options = {}) {
         this._super({
             ...options,
             // Always open the dialog for the basic theme as it has no sidebar.