diff --git a/CRM/Twingle/Form/Profile.php b/CRM/Twingle/Form/Profile.php
index 5f18715..3491125 100644
--- a/CRM/Twingle/Form/Profile.php
+++ b/CRM/Twingle/Form/Profile.php
@@ -329,7 +329,7 @@ class CRM_Twingle_Form_Profile extends CRM_Core_Form {
 
     $this->add(
       'checkbox', // field type
-      'double_opt_in', // field name
+      'newsletter_double_opt_in', // field name
       E::ts('Use Double-Opt-In for newsletter'), // field label
       FALSE, // is not required
       array()
@@ -339,7 +339,7 @@ class CRM_Twingle_Form_Profile extends CRM_Core_Form {
       'select', // field type
       'newsletter_groups', // field name
       E::ts('Sign up for newsletter groups'), // field label
-      static::getNewsletterGroups($this->profile->getAttribute('double_opt_in')), // list of options
+      static::getNewsletterGroups($this->profile->getAttribute('newsletter_double_opt_in')), // list of options
       FALSE, // is not required
       array('class' => 'crm-select2 huge', 'multiple' => 'multiple')
     );
@@ -556,7 +556,7 @@ class CRM_Twingle_Form_Profile extends CRM_Core_Form {
         $values['name'] = 'default';
       }
       $this->profile->setName($values['name']);
-      $this->profile->setAttribute('double_opt_in', isset($values['double_opt_in']));
+      $this->profile->setAttribute('newsletter_double_opt_in', isset($values['newsletter_double_opt_in']));
       foreach ($this->profile->getData() as $element_name => $value) {
         if (isset($values[$element_name])) {
           $this->profile->setAttribute($element_name, $values[$element_name]);
diff --git a/CRM/Twingle/Profile.php b/CRM/Twingle/Profile.php
index e0afe35..9c86f1a 100644
--- a/CRM/Twingle/Profile.php
+++ b/CRM/Twingle/Profile.php
@@ -221,7 +221,7 @@ class CRM_Twingle_Profile {
         'membership_type_id',
         'membership_type_id_recur',
         'membership_postprocess_call',
-        'double_opt_in'
+        'newsletter_double_opt_in'
       ),
       // Add payment methods.
       array_keys(static::paymentInstruments()),
@@ -294,7 +294,7 @@ class CRM_Twingle_Profile {
       'custom_field_mapping' => NULL,
       'membership_type_id' => NULL,
       'membership_type_id_recur' => NULL,
-      'double_opt_in' => NULL,
+      'newsletter_double_opt_in' => NULL,
     )
       // Add contribution status for all payment methods.
       + array_fill_keys(array_map(function($attribute) {
diff --git a/api/v3/TwingleDonation/Submit.php b/api/v3/TwingleDonation/Submit.php
index d0f9061..19217b6 100644
--- a/api/v3/TwingleDonation/Submit.php
+++ b/api/v3/TwingleDonation/Submit.php
@@ -486,8 +486,8 @@ function civicrm_api3_twingle_donation_Submit($params) {
 
       // If usage of double opt-in is selected, use MailingEventSubscribe.create to add contact to newsletter groups
       // defined in the profile
-      $result_values['newsletter']['double_opt_in'] = ($profile->getAttribute('double_opt_in')) ? 'true' : 'false';
-      if ($profile->getAttribute('double_opt_in') &&
+      $result_values['newsletter']['newsletter_double_opt_in'] = ($profile->getAttribute('newsletter_double_opt_in')) ? 'true' : 'false';
+      if ($profile->getAttribute('newsletter_double_opt_in') &&
           !empty($params['newsletter']) &&
           !empty($groups = $profile->getAttribute('newsletter_groups'))) {
           $group_memberships = array_column(civicrm_api3('GroupContact', 'get', array (
diff --git a/templates/CRM/Twingle/Form/Profile.tpl b/templates/CRM/Twingle/Form/Profile.tpl
index 3e6a07e..83dc4cb 100644
--- a/templates/CRM/Twingle/Form/Profile.tpl
+++ b/templates/CRM/Twingle/Form/Profile.tpl
@@ -209,13 +209,13 @@
       <table class="form-layout-compressed">
 
         <tr class="crm-section">
-          <td class="label">{$form.double_opt_in.label}</td>
-          <td class="content">{$form.double_opt_in.html}</td>
+          <td class="label">{$form.newsletter_groups.label}</td>
+          <td class="content">{$form.newsletter_groups.html}</td>
         </tr>
 
         <tr class="crm-section">
-          <td class="label">{$form.newsletter_groups.label}</td>
-          <td class="content">{$form.newsletter_groups.html}</td>
+          <td class="label">{$form.newsletter_double_opt_in.label}</td>
+          <td class="content">{$form.newsletter_double_opt_in.html}</td>
         </tr>
 
         <tr class="crm-section">