diff --git a/src/MoneySpeller.php b/src/MoneySpeller.php
index 2ca1255..eb49132 100644
--- a/src/MoneySpeller.php
+++ b/src/MoneySpeller.php
@@ -8,5 +8,5 @@ abstract class MoneySpeller implements Currency
     const CLARIFICATION_FORMAT = 'clarification';
     const DUPLICATION_FORMAT = 'duplication';
 
-	public static function spell($value, $currency, $format = self::NORMAL_FORMAT) {}
+    public static function spell($value, $currency, $format = self::NORMAL_FORMAT) {}
 }