diff --git a/libcxx/include/fstream b/libcxx/include/fstream
--- a/libcxx/include/fstream
+++ b/libcxx/include/fstream
@@ -186,7 +186,11 @@
 #include <__locale>
 #include <cstdio>
 #include <cstdlib>
+
+#if _LIBCPP_STD_VER >= 17 && !defined(_MSC_VER)
 #include <filesystem>
+#define _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
+#endif
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #pragma GCC system_header
@@ -235,7 +239,7 @@
     _LIBCPP_INLINE_VISIBILITY
     basic_filebuf* open(const string& __s, ios_base::openmode __mode);
 
-#if _LIBCPP_STD_VER >= 17
+#ifdef _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
     _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
     basic_filebuf* open(const _VSTD_FS::path& __p, ios_base::openmode __mode) {
       return open(__p.c_str(), __mode);
@@ -1151,11 +1155,11 @@
 #endif
     _LIBCPP_INLINE_VISIBILITY
     explicit basic_ifstream(const string& __s, ios_base::openmode __mode = ios_base::in);
-#if _LIBCPP_STD_VER >= 17
+#ifdef _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
     _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
     explicit basic_ifstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in)
       : basic_ifstream(__p.c_str(), __mode) {}
-#endif // _LIBCPP_STD_VER >= 17
+#endif // _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
 #endif
 #ifndef _LIBCPP_CXX03_LANG
     _LIBCPP_INLINE_VISIBILITY
@@ -1177,13 +1181,13 @@
     void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in);
 #endif
     void open(const string& __s, ios_base::openmode __mode = ios_base::in);
-#if _LIBCPP_STD_VER >= 17
+#ifdef _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
     _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
     void open(const filesystem::path& __p,
               ios_base::openmode __mode = ios_base::in) {
       return open(__p.c_str(), __mode);
     }
-#endif // _LIBCPP_STD_VER >= 17
+#endif // _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
 
     _LIBCPP_INLINE_VISIBILITY
     void __open(int __fd, ios_base::openmode __mode);
@@ -1365,11 +1369,11 @@
     _LIBCPP_INLINE_VISIBILITY
     explicit basic_ofstream(const string& __s, ios_base::openmode __mode = ios_base::out);
 
-#if _LIBCPP_STD_VER >= 17
+#ifdef _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
     _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
     explicit basic_ofstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out)
       : basic_ofstream(__p.c_str(), __mode) {}
-#endif // _LIBCPP_STD_VER >= 17
+#endif // _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
 
 #ifndef _LIBCPP_CXX03_LANG
     _LIBCPP_INLINE_VISIBILITY
@@ -1392,11 +1396,11 @@
 #endif
     void open(const string& __s, ios_base::openmode __mode = ios_base::out);
 
-#if _LIBCPP_STD_VER >= 17
+#ifdef _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
     _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
     void open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out)
     { return open(__p.c_str(), __mode); }
-#endif // _LIBCPP_STD_VER >= 17
+#endif // _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
 
     _LIBCPP_INLINE_VISIBILITY
     void __open(int __fd, ios_base::openmode __mode);
@@ -1579,11 +1583,11 @@
     _LIBCPP_INLINE_VISIBILITY
     explicit basic_fstream(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
 
-#if _LIBCPP_STD_VER >= 17
+#ifdef _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
     _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
     explicit basic_fstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in | ios_base::out)
       : basic_fstream(__p.c_str(), __mode) {}
-#endif // _LIBCPP_STD_VER >= 17
+#endif // _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
 
 #endif
 #ifndef _LIBCPP_CXX03_LANG
@@ -1607,11 +1611,11 @@
 #endif
     void open(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
 
-#if _LIBCPP_STD_VER >= 17
+#ifdef _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
     _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
     void open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in|ios_base::out)
     { return open(__p.c_str(), __mode); }
-#endif // _LIBCPP_STD_VER >= 17
+#endif // _LIBCPP_ENABLE_FILESYSTEM_OVERLOADS
 
 #endif
     _LIBCPP_INLINE_VISIBILITY