diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp
index 6bf77d507..496007c0d 100644
--- a/include/nlohmann/json.hpp
+++ b/include/nlohmann/json.hpp
@@ -310,7 +310,10 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
         result["compiler"] = {{"family", "unknown"}, {"version", "unknown"}};
 #endif
 
-#ifdef __cplusplus
+
+#if defined(_MSVC_LANG)
+        result["compiler"]["c++"] = std::to_string(_MSVC_LANG);
+#elif defined(__cplusplus)
         result["compiler"]["c++"] = std::to_string(__cplusplus);
 #else
         result["compiler"]["c++"] = "unknown";
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index ba272a126..33a91164c 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -17505,7 +17505,10 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
         result["compiler"] = {{"family", "unknown"}, {"version", "unknown"}};
 #endif
 
-#ifdef __cplusplus
+
+#if defined(_MSVC_LANG)
+        result["compiler"]["c++"] = std::to_string(_MSVC_LANG);
+#elif defined(__cplusplus)
         result["compiler"]["c++"] = std::to_string(__cplusplus);
 #else
         result["compiler"]["c++"] = "unknown";