diff --git a/mayan/apps/metadata/serializers.py b/mayan/apps/metadata/serializers.py
index 8fb9900b0a..bdecbabd68 100644
--- a/mayan/apps/metadata/serializers.py
+++ b/mayan/apps/metadata/serializers.py
@@ -17,7 +17,7 @@ class DocumentMetadataSerializer(serializers.ModelSerializer):
     document = serializers.PrimaryKeyRelatedField(read_only=True)
 
     class Meta:
-        fields = ('id', 'metadata_type', 'value',)
+        fields = ('document', 'id', 'metadata_type', 'value',)
         model = DocumentMetadata