diff --git a/src/Extension.php b/src/Extension.php
index 8384184..79a659c 100644
--- a/src/Extension.php
+++ b/src/Extension.php
@@ -43,6 +43,13 @@ class Extension extends AbstractPluginIntegration {
 	 */
 	private static $send_email_now = false;
 
+	/**
+	 * Form action.
+	 *
+	 * @var FrmFormAction|null
+	 */
+	private $action;
+
 	/**
 	 * Construct and initializes an Formidable Forms extension object.
 	 */