diff --git a/src/hmmmath/Exception/InvalidArgumentException.php b/src/hmmmath/Exception/InvalidArgumentException.php
index 009084b..1c644e8 100644
--- a/src/hmmmath/Exception/InvalidArgumentException.php
+++ b/src/hmmmath/Exception/InvalidArgumentException.php
@@ -44,7 +44,7 @@ private static function validateType($value, string $type, ?string $specializati
 
         $validationMethod = 'validate' . $type . strtr($specialization, ['.' => '']);
 
-        if (!is_callable(['static', $validationMethod])) {
+        if (!is_callable([static::class, $validationMethod])) {
             return false;
         }