diff --git a/src/win32/thread.cpp b/src/win32/thread.cpp
index aae37ccf..ded62056 100644
--- a/src/win32/thread.cpp
+++ b/src/win32/thread.cpp
@@ -529,11 +529,8 @@ namespace boost
 
     unsigned thread::physical_concurrency() BOOST_NOEXCEPT
     {
-// a bit too strict: Windows XP with SP3 would be sufficient
-#if BOOST_PLAT_WINDOWS_RUNTIME                                    \
-    || ( BOOST_USE_WINAPI_VERSION <= BOOST_WINAPI_VERSION_WINXP ) \
-    || ( defined(__MINGW32__) && !defined(__MINGW64__) )
-        return 0;
+#if BOOST_PLAT_WINDOWS_RUNTIME
+        return hardware_concurrency();
 #else
         unsigned cores = 0;
         DWORD size = 0;