diff --git a/include/nlohmann/detail/output/serializer.hpp b/include/nlohmann/detail/output/serializer.hpp
index 1710b7ce7..1cad019d5 100644
--- a/include/nlohmann/detail/output/serializer.hpp
+++ b/include/nlohmann/detail/output/serializer.hpp
@@ -380,7 +380,6 @@ class serializer
                         const bool ensure_ascii,
                         const unsigned int indent_step,
                         const unsigned int current_indent = 0) {
-        // o->write_characters(UnderlyingType::get_annotation("property3").c_str(), UnderlyingType::get_annotation("property1").size());
         switch (val.m_data.m_type)
         {
             case value_t::object:
diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp
index f7ea7f0be..c06a4be43 100644
--- a/include/nlohmann/json.hpp
+++ b/include/nlohmann/json.hpp
@@ -4217,8 +4217,6 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
         /// the value of the current element
         json_value m_value = {};
 
-        std::string m_annotation{""};
-
         data(const value_t v)
             : m_type(v), m_value(v)
         {
@@ -4257,10 +4255,6 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
     /// @{
 
   public:
-    void annotate(const std::string& annotation) {
-        m_data.m_annotation = annotation;
-    }
-
     /// @brief create a CBOR serialization of a given JSON value
     /// @sa https://json.nlohmann.me/api/basic_json/to_cbor/
     static std::vector<std::uint8_t> to_cbor(const basic_json& j)