1 files changed, 5 insertions, 1 deletions
diff --git a/src/Response.cpp b/src/Response.cpp
index d7006c9..286de52 100644
--- a/src/Response.cpp
+++ b/src/Response.cpp
@@ -10,7 +10,11 @@ Response::json Response::simple_response(std::string const &text, std::string co
 Response::json Response::create_annotation(Reply::AnnotationType annotationType, std::string const &extra) {
     json annotation(crow::json::type::Object);
     annotation["type"] = Reply::GetStringAnnotationType(annotationType);
-    annotation["extra"] = create_text(extra);
+    if (extra.empty()) {
+        annotation["extra"] = json(crow::json::type::List);
+    } else {
+        annotation["extra"] = create_text(extra);
+    }
     return annotation;
 }