diff --git a/workflow/engine/src/ProcessMaker/BusinessModel/Pmgmail.php b/workflow/engine/src/ProcessMaker/BusinessModel/Pmgmail.php
index beaab1581..663914a24 100644
--- a/workflow/engine/src/ProcessMaker/BusinessModel/Pmgmail.php
+++ b/workflow/engine/src/ProcessMaker/BusinessModel/Pmgmail.php
@@ -355,6 +355,7 @@ class Pmgmail {
             error_log(G::LoadTranslation('ID_EMAIL_ENGINE_IS_NOT_ENABLED'));
             return false;
         }
+        \G::LoadClass("wsBase");
 
         $ws = new \wsBase();
         $resultMail = $ws->sendMessage(