diff --git a/src/Enum.php b/src/Enum.php
index 869a7a0..1a41655 100644
--- a/src/Enum.php
+++ b/src/Enum.php
@@ -151,7 +151,7 @@ public static function isValidValue(
 		$value
 	): bool
 	{
-		return \in_array($value, self::getAvailableValues(), true);
+		return \in_array($value, static::getAvailableValues(), true);
 	}
 
 	protected function checkSameEnum(