diff --git a/application/Espo/ORM/Repository/RDBRepository.php b/application/Espo/ORM/Repository/RDBRepository.php
index fb0201aaf3..646da1014c 100644
--- a/application/Espo/ORM/Repository/RDBRepository.php
+++ b/application/Espo/ORM/Repository/RDBRepository.php
@@ -628,7 +628,7 @@ class RDBRepository extends Repository
      *
      * @return int|float
      */
-    public function sum(string $attributel)
+    public function sum(string $attribute)
     {
         return $this->createSelectBuilder()->sum($attribute);
     }