diff --git a/src/Transformer/AbstractTransformer.php b/src/Transformer/AbstractTransformer.php
index e4f847f..7348df7 100644
--- a/src/Transformer/AbstractTransformer.php
+++ b/src/Transformer/AbstractTransformer.php
@@ -56,17 +56,28 @@ protected function recursiveSetValues(array &$array)
 
     /**
      * @param array $array
+     * @param null $parentKey
+     * @param null $currentKey
      */
-    protected function recursiveFlattenOneElementObjectsToScalarType(array &$array)
+    protected function recursiveFlattenOneElementObjectsToScalarType(array &$array, $parentKey = null, $currentKey = null)
     {
         if (1 === \count($array) && \is_scalar(\end($array))) {
-            $array = \array_pop($array);
+            if ($parentKey == $currentKey) {
+                $array = \array_pop($array);
+            }
         }
 
         if (\is_array($array)) {
-            foreach ($array as &$value) {
+            foreach ($array as $parentKey => &$value) {
+
                 if (\is_array($value)) {
-                    $this->recursiveFlattenOneElementObjectsToScalarType($value);
+                    $key = null;
+                    foreach($value as $key => $v) {
+                        if (is_array($v)) {
+                            $this->recursiveFlattenOneElementObjectsToScalarType($v, $parentKey, $key);
+                        }
+                    }
+                    $this->recursiveFlattenOneElementObjectsToScalarType($value, $parentKey, $key);
                 }
             }
         }
diff --git a/tests/Transformer/JsonTransformerTest.php b/tests/Transformer/JsonTransformerTest.php
index ae4a97a..d6b41e5 100644
--- a/tests/Transformer/JsonTransformerTest.php
+++ b/tests/Transformer/JsonTransformerTest.php
@@ -23,6 +23,46 @@
 
 class JsonTransformerTest extends \PHPUnit_Framework_TestCase
 {
+
+    public function testSerializationObjectWithArrayOfOneAttribute()
+    {
+        $object = new \stdClass();
+        $object->payload = ['userId' => 1];
+
+        $serializer = new DeepCopySerializer(new JsonTransformer());
+
+        $expected = <<<STRING
+{
+    "payload": {
+        "userId": 1
+    }
+}
+STRING;
+
+        $this->assertEquals($expected, $serializer->serialize($object));
+    }
+
+    public function testSerializationObjectWithObjectOfOneAttribute()
+    {
+        $internal = new \stdClass();
+        $internal->userId = 1;
+
+        $object = new \stdClass();
+        $object->payload = $internal;
+
+        $serializer = new DeepCopySerializer(new JsonTransformer());
+
+        $expected = <<<STRING
+{
+    "payload": {
+        "userId": 1
+    }
+}
+STRING;
+
+        $this->assertEquals($expected, $serializer->serialize($object));
+    }
+
     public function testSerialization()
     {
         $object = $this->getObject();