diff --git a/Misc/NEWS.d/next/Windows/2020-05-19-04-11-12.bpo-40677.qQbLW8.rst b/Misc/NEWS.d/next/Windows/2020-05-19-04-11-12.bpo-40677.qQbLW8.rst
new file mode 100644
index 00000000000..a09cb243aba
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2020-05-19-04-11-12.bpo-40677.qQbLW8.rst
@@ -0,0 +1 @@
+Manually define IO_REPARSE_TAG_APPEXECLINK in case some old Windows SDK doesn't have it.
\ No newline at end of file
diff --git a/Modules/_stat.c b/Modules/_stat.c
index c7090c02688..546e6a5f94c 100644
--- a/Modules/_stat.c
+++ b/Modules/_stat.c
@@ -40,6 +40,10 @@ typedef unsigned short mode_t;
 #  define FILE_ATTRIBUTE_NO_SCRUB_DATA 0x20000
 #endif
 
+#ifndef IO_REPARSE_TAG_APPEXECLINK
+#  define IO_REPARSE_TAG_APPEXECLINK 0x8000001BL
+#endif
+
 #endif /* MS_WINDOWS */
 
 /* From Python's stat.py */