diff --git a/src/Configurator.php b/src/Configurator.php
index ac385ca7..8bdda3bf 100644
--- a/src/Configurator.php
+++ b/src/Configurator.php
@@ -408,10 +408,8 @@ private function getPropertyMetadata(\ReflectionProperty $property, string $name
 
     private function isOnInsertGeneratedField(Field $field): bool
     {
-        return $field->isPrimary()
-            || $field->getType() === 'serial'
-            || $field->getType() === 'smallserial'
-            || $field->getType() === 'serial'
-            || $field->getType() === 'bigserial';
+        return $field->isPrimary() || match ($field->getType()) {
+            'serial', 'bigserial', 'smallserial' => true
+        };
     }
 }