diff --git a/src/Command.php b/src/Command.php
index 6ae9368..e511d83 100644
--- a/src/Command.php
+++ b/src/Command.php
@@ -168,7 +168,7 @@ class Command extends Component
 	{
 		$pdo = $this->db->getConnect($this->sql);
 		$result = $pdo->execute($this->sql, $isInsert, $this->params);
-		if (is_null($hasAutoIncrement) && $result == 0) {
+		if (!is_null($hasAutoIncrement) && $result == 0) {
 			return false;
 		}
 		return $result;