diff -r 6478e6d0476f Include/pyport.h
--- a/Include/pyport.h	Wed Jan 11 01:07:03 2017 +0100
+++ b/Include/pyport.h	Wed Jan 11 01:23:32 2017 +0100
@@ -530,6 +530,8 @@ extern "C" {
  */
 #if defined(__GNUC__) || defined(__clang__)
 #  define _Py_NO_INLINE __attribute__((noinline))
+#elif defined(_MSC_VER)
+#  define _Py_NO_INLINE __declspec(noinline)
 #else
 #  define _Py_NO_INLINE
 #endif