diff --git a/src/Normalizer/Value/RelationshipItemNormalizerValue.php b/src/Normalizer/Value/RelationshipItemNormalizerValue.php
index 3a180aa..89922a1 100644
--- a/src/Normalizer/Value/RelationshipItemNormalizerValue.php
+++ b/src/Normalizer/Value/RelationshipItemNormalizerValue.php
@@ -41,7 +41,7 @@ class RelationshipItemNormalizerValue extends FieldItemNormalizerValue implement
     }
     $rasterizedValue = [
       'type' => $this->resource->getTypeName(),
-      'id' => is_array($value) ? $value['target__uuid'] : $value,
+      'id' => is_array($value) ? $value['target_uuid'] : $value,
     ];
 
     if (!empty($value['meta'])) {