diff --git a/include/ghc/fs_std.hpp b/include/ghc/fs_std.hpp
index bb5480c..8056569 100644
--- a/include/ghc/fs_std.hpp
+++ b/include/ghc/fs_std.hpp
@@ -30,7 +30,7 @@
 //              namespace fs.
 //---------------------------------------------------------------------------------------
 #ifndef GHC_FILESYSTEM_STD_H
-#if defined(__cplusplus) && __cplusplus >= 201703L && defined(__has_include)
+#if (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L) && defined(__has_include)
 #if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
 #define GHC_USE_STD_FS
 #include <filesystem>
diff --git a/include/ghc/fs_std_fwd.hpp b/include/ghc/fs_std_fwd.hpp
index 68c3799..1a7d4bb 100644
--- a/include/ghc/fs_std_fwd.hpp
+++ b/include/ghc/fs_std_fwd.hpp
@@ -33,7 +33,7 @@
 //---------------------------------------------------------------------------------------
 #ifndef GHC_FILESYSTEM_STD_FWD_H
 #define GHC_FILESYSTEM_STD_FWD_H
-#if defined(__cplusplus) && __cplusplus >= 201703L && defined(__has_include)
+#if (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L) && defined(__has_include)
 #if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
 #define GHC_USE_STD_FS
 #include <filesystem>
diff --git a/include/ghc/fs_std_impl.hpp b/include/ghc/fs_std_impl.hpp
index dcff655..beb2b8e 100644
--- a/include/ghc/fs_std_impl.hpp
+++ b/include/ghc/fs_std_impl.hpp
@@ -31,7 +31,7 @@
 // The cpp has to include this before including fs_std_fwd.hpp directly or via a different
 // header to work.
 //---------------------------------------------------------------------------------------
-#if defined(__cplusplus) && __cplusplus >= 201703L && defined(__has_include)
+#if (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L) && defined(__has_include)
 #if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
 #define GHC_USE_STD_FS
 #endif