diff --git a/Base/Model.php b/Base/Model.php
index fddd71f..303cc84 100644
--- a/Base/Model.php
+++ b/Base/Model.php
@@ -242,7 +242,7 @@ abstract class Model extends Component implements ModelInterface, ArrayAccess, \
         $query = new ActiveQuery($model);
         $query->from($model->getTable())->alias('t1');
         if (is_numeric($param)) {
-            $query->where([$model->getPrimary() => $param]);
+            $query->where([$model->getPrimary() => +$param]);
         } else if (is_array($param)) {
             $query->where($param);
         } else {