diff --git a/src/Faker/Calculator/Iban.php b/src/Faker/Calculator/Iban.php
index c8fae24239..470bf0391a 100644
--- a/src/Faker/Calculator/Iban.php
+++ b/src/Faker/Calculator/Iban.php
@@ -17,7 +17,7 @@ public static function checksum($iban)
         $checkString = substr($iban, 4) . substr($iban, 0, 2) . '00';
 
         // Replace all letters with their number equivalents
-        $checkString = preg_replace_callback('/[A-Z]/', ['self', 'alphaToNumberCallback'], $checkString);
+        $checkString = preg_replace_callback('/[A-Z]/', [self::class, 'alphaToNumberCallback'], $checkString);
 
         // Perform mod 97 and subtract from 98
         $checksum = 98 - self::mod97($checkString);