diff --git a/snappymail/v/0.0.0/app/libraries/RainLoop/Plugins/Helper.php b/snappymail/v/0.0.0/app/libraries/RainLoop/Plugins/Helper.php
index 8776eab83..3df235db9 100644
--- a/snappymail/v/0.0.0/app/libraries/RainLoop/Plugins/Helper.php
+++ b/snappymail/v/0.0.0/app/libraries/RainLoop/Plugins/Helper.php
@@ -4,7 +4,7 @@ namespace RainLoop\Plugins;
 
 class Helper
 {
-	static public function ValidateWildcardValues(string $sString, string $sWildcardValues, string &$sFoundedValue) : bool
+	static public function ValidateWildcardValues(string $sString, string $sWildcardValues, string &$sFoundedValue = null) : bool
 	{
 		$sFoundedValue = '';