diff --git a/Classes/Domain/Validator/SpamShield/RecaptchaMethod.php b/Classes/Domain/Validator/SpamShield/RecaptchaMethod.php
index 83d8ee5..5231728 100644
--- a/Classes/Domain/Validator/SpamShield/RecaptchaMethod.php
+++ b/Classes/Domain/Validator/SpamShield/RecaptchaMethod.php
@@ -125,7 +125,7 @@ protected function getActionName(): string
     {
         $request = $GLOBALS['TYPO3_REQUEST'];
         $pluginVariables = $request->getQueryParams()['tx_powermail_pi1'];
-        ArrayUtility::mergeRecursiveWithOverrule($pluginVariables, $request->getParsedBody()['tx_powermail_pi1']);
+        ArrayUtility::mergeRecursiveWithOverrule($pluginVariables, $request->getParsedBody()['tx_powermail_pi1'] ?? []);
         return $pluginVariables['action'];
     }
 }