diff --git a/src/Helpers/email_helper.php b/src/Helpers/email_helper.php
index 35a28908b..8fd51c6ba 100644
--- a/src/Helpers/email_helper.php
+++ b/src/Helpers/email_helper.php
@@ -13,7 +13,7 @@
 
 use CodeIgniter\Email\Email;
 
-if (! defined('emailer')) {
+if (! function_exists('emailer')) {
     /**
      * Provides convenient access to the CodeIgniter Email class.
      *