diff --git a/CRM/Utils/Mail/EmailProcessor.php b/CRM/Utils/Mail/EmailProcessor.php
index aa7e6d93a4e0..ba8d7309bd4f 100644
--- a/CRM/Utils/Mail/EmailProcessor.php
+++ b/CRM/Utils/Mail/EmailProcessor.php
@@ -90,7 +90,7 @@ public static function process($civiMail = TRUE) {
    * @throws Exception
    * @throws CRM_Core_Exception
    */
-  public static function _process($civiMail, $dao, $is_create_activities) {
+  private static function _process($civiMail, $dao, $is_create_activities) {
     // 0 = activities; 1 = bounce;
     $usedfor = $dao->is_default;
     if ($usedfor == 0) {