diff --git a/assets/js/src/newsletter_editor/components/save.js b/assets/js/src/newsletter_editor/components/save.js
index f7e43b5614..eda00528ee 100644
--- a/assets/js/src/newsletter_editor/components/save.js
+++ b/assets/js/src/newsletter_editor/components/save.js
@@ -20,8 +20,10 @@ Module.save = function () {
 
   // Stringify to enable transmission of primitive non-string value types
   if (!_.isUndefined(json.body)) {
-    delete json.body.blockDefaults.woocommerceHeading;
-    delete json.body.blockDefaults.woocommerceContent;
+    if (json.body.blockDefaults) {
+      delete json.body.blockDefaults.woocommerceHeading;
+      delete json.body.blockDefaults.woocommerceContent;
+    }
     json.body = JSON.stringify(json.body);
   }