diff --git a/CHANGELOG.md b/CHANGELOG.md
index e3c4b0ae..0c5eada3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@
 #### Changed
 - Improved and more extensive documentation
 
+### 0.3.5 - 2015-08-19
+
+#### Fixed
+- The included key is not sent if it is empty
+
 ### 0.3.4 - 2015-08-18
 
 #### Fixed
diff --git a/src/JsonApi/Schema/Included.php b/src/JsonApi/Schema/Included.php
index 15730050..1dfb36c5 100644
--- a/src/JsonApi/Schema/Included.php
+++ b/src/JsonApi/Schema/Included.php
@@ -8,6 +8,14 @@ class Included
      */
     private $included = [];
 
+    /**
+     * @return bool
+     */
+    public function isEmpty()
+    {
+        return empty($this->included);
+    }
+
     /**
      * @param array $transformedResource
      * @return $this
diff --git a/src/JsonApi/Transformer/AbstractCompoundDocument.php b/src/JsonApi/Transformer/AbstractCompoundDocument.php
index 964eac89..dbfe905b 100644
--- a/src/JsonApi/Transformer/AbstractCompoundDocument.php
+++ b/src/JsonApi/Transformer/AbstractCompoundDocument.php
@@ -130,7 +130,7 @@ protected function transformContent(RequestInterface $request)
         $content["data"] = $this->data;
 
         // Included
-        if ($this->included !== null) {
+        if ($this->included->isEmpty() === false) {
             $content["included"] = $this->included->transform();
         }