diff --git a/lib/Collection/ValueLoaderInterface.php b/lib/Collection/ValueLoaderInterface.php
index <HASH>..<HASH> 100644
--- a/lib/Collection/ValueLoaderInterface.php
+++ b/lib/Collection/ValueLoaderInterface.php
@@ -2,6 +2,8 @@
 
 namespace Netgen\BlockManager\Collection;
 
+use Netgen\BlockManager\API\Exception\NotFoundException;
+
 interface ValueLoaderInterface
 {
     /**
@@ -16,6 +18,8 @@ interface ValueLoaderInterface
      *
      * @param int|string $id
      *
+     * @throws \Netgen\BlockManager\API\Exception\NotFoundException If value cannot be loaded
+     *
      * @return mixed
      */
     public function load($id);
diff --git a/lib/Tests/Collection/Stubs/ValueLoader.php b/lib/Tests/Collection/Stubs/ValueLoader.php
index <HASH>..<HASH> 100644
--- a/lib/Tests/Collection/Stubs/ValueLoader.php
+++ b/lib/Tests/Collection/Stubs/ValueLoader.php
@@ -21,6 +21,8 @@ class ValueLoader implements ValueLoaderInterface
      *
      * @param int|string $id
      *
+     * @throws \Netgen\BlockManager\API\Exception\NotFoundException If value cannot be loaded
+     *
      * @return mixed
      */
     public function load($id)
Throw exception if value could not be loaded