diff --git a/CMakeLists.txt b/CMakeLists.txt
index a7590452d..440af8be5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -142,6 +142,7 @@ endif()
 if(WIN32 OR CYGWIN)
     target_compile_definitions(boost_filesystem PRIVATE
         BOOST_USE_WINDOWS_H
+        _WIN32_WINNT=0x0A00
         WIN32_LEAN_AND_MEAN
         NOMINMAX
     )
diff --git a/build/Jamfile.v2 b/build/Jamfile.v2
index f6c8e5d43..a37819021 100644
--- a/build/Jamfile.v2
+++ b/build/Jamfile.v2
@@ -161,9 +161,11 @@ project boost/filesystem
       <target-os>windows:<define>_CRT_SECURE_NO_WARNINGS
       <target-os>windows:<define>_CRT_SECURE_NO_DEPRECATE
       <target-os>windows:<define>BOOST_USE_WINDOWS_H
+      <target-os>windows:<define>_WIN32_WINNT=0x0A00
       <target-os>windows:<define>WIN32_LEAN_AND_MEAN
       <target-os>windows:<define>NOMINMAX
       <target-os>cygwin:<define>BOOST_USE_WINDOWS_H
+      <target-os>cygwin:<define>_WIN32_WINNT=0x0A00
       <target-os>cygwin:<define>WIN32_LEAN_AND_MEAN
       <target-os>cygwin:<define>NOMINMAX