diff --git a/framework/db/BaseActiveRecord.php b/framework/db/BaseActiveRecord.php
index 403979d0b9..a5fef653b3 100644
--- a/framework/db/BaseActiveRecord.php
+++ b/framework/db/BaseActiveRecord.php
@@ -1152,7 +1152,7 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
      */
     public function getOldPrimaryKey($asArray = false)
     {
-        $keys = $this->primaryKey();
+        $keys = static::primaryKey();
         if (empty($keys)) {
             throw new Exception(get_class($this) . ' does not have a primary key. You should either define a primary key for the corresponding table or override the primaryKey() method.');
         }