diff --git a/More/Repository/PostRepository.php b/More/Repository/PostRepository.php
index 991a398..417bf52 100644
--- a/More/Repository/PostRepository.php
+++ b/More/Repository/PostRepository.php
@@ -28,7 +28,7 @@ class PostRepository
         $arrayData = $this->persistence->retrieve($id);
 
         if (is_null($arrayData)) {
-            throw new \InvalidArgumentException(sprintf('Post with ID %d does not exist'));
+            throw new \InvalidArgumentException(sprintf('Post with ID %d does not exist', $id));
         }
 
         return Post::fromState($arrayData);