diff --git a/assets/js/src/public.js b/assets/js/src/public.js
index 0635a7ae0c..71eb44c75c 100644
--- a/assets/js/src/public.js
+++ b/assets/js/src/public.js
@@ -36,7 +36,12 @@ function ( // eslint-disable-line func-names
             // non ajax post request
             return true;
           }
-            // ajax request
+
+          if (formData['g-recaptcha-response']) {
+            formData.data.recaptcha = formData['g-recaptcha-response'];
+          }
+
+          // ajax request
           MailPoet.Ajax.post({
             url: window.MailPoetForm.ajax_url,
             token: formData.token,
diff --git a/views/form/iframe.html b/views/form/iframe.html
index 9cbed9470e..17ee7675fb 100644
--- a/views/form/iframe.html
+++ b/views/form/iframe.html
@@ -22,4 +22,4 @@
       var MailPoetForm = <%= json_encode(mailpoet_form) %>;
     </script>
   </body>
-</html>
\ No newline at end of file
+</html>