diff --git a/modules/mailchimp_signup/mailchimp_signup.module b/modules/mailchimp_signup/mailchimp_signup.module
index 083b05f..c47e080 100644
--- a/modules/mailchimp_signup/mailchimp_signup.module
+++ b/modules/mailchimp_signup/mailchimp_signup.module
@@ -274,6 +274,8 @@ function mailchimp_signup_subscribe_form($form, &$form_state, $signup, $type) {
     drupal_set_message('The subscription service is currently unavailable. Please try again later.', 'warning');
   }
 
+  global $user;
+  $mail = isset($user->mail) ? $user->mail : '';
   $list = array();
   if ($lists_count > 1) {
     foreach ($lists as $list) {
@@ -299,7 +301,7 @@ function mailchimp_signup_subscribe_form($form, &$form_state, $signup, $type) {
             ),
           ),
         );
-        $form['mailchimp_lists'][$wrapper_key]['interest_groups'] += mailchimp_interest_groups_form_elements($list);
+        $form['mailchimp_lists'][$wrapper_key]['interest_groups'] += mailchimp_interest_groups_form_elements($list, NULL, $mail);
       }
     }
   }
@@ -307,7 +309,7 @@ function mailchimp_signup_subscribe_form($form, &$form_state, $signup, $type) {
     $list = reset($lists);
     if ($signup->settings['include_interest_groups'] && isset($list['intgroups'])) {
       $form['mailchimp_lists']['#weight'] = 9;
-      $form['mailchimp_lists']['interest_groups'] = mailchimp_interest_groups_form_elements($list);
+      $form['mailchimp_lists']['interest_groups'] = mailchimp_interest_groups_form_elements($list, NULL, $mail);
     }
   }
   $form['mergevars'] = array(