diff --git a/Models/NullQAAnswer.php b/Models/NullQAAnswer.php
index 7dfd3fb..70a8a26 100644
--- a/Models/NullQAAnswer.php
+++ b/Models/NullQAAnswer.php
@@ -34,5 +34,6 @@ final class NullQAAnswer extends QAAnswer
     public function __construct(int $id = 0)
     {
         $this->id = $id;
+        parent::__construct();
     }
 }
diff --git a/Models/NullQAQuestion.php b/Models/NullQAQuestion.php
index 5e1b126..5ba0d47 100644
--- a/Models/NullQAQuestion.php
+++ b/Models/NullQAQuestion.php
@@ -34,5 +34,6 @@ final class NullQAQuestion extends QAQuestion
     public function __construct(int $id = 0)
     {
         $this->id = $id;
+        parent::__construct();
     }
 }