diff --git a/Configuration/TCA/tx_sgjobs_domain_model_job.php b/Configuration/TCA/tx_sgjobs_domain_model_job.php
index e6a00b945c067c5c007fd159217622378daa1708..0343ecedef38338747d12d12230c7a347d5e80ee 100644
--- a/Configuration/TCA/tx_sgjobs_domain_model_job.php
+++ b/Configuration/TCA/tx_sgjobs_domain_model_job.php
@@ -394,7 +394,7 @@ return call_user_func(
 					'label' => 'LLL:EXT:' . $extKey . '/Resources/Private/Language/locallang_db.xlf:' . $table . '.salary_currency',
 					'config' => [
 						'type' => 'input',
-						'eval' => 'upper',
+						'eval' => 'alpha, upper',
 						'max' => 3,
 					],
 				],