From 6b7bf01e4a6c31ba0d0293bfa67304d7548f94d0 Mon Sep 17 00:00:00 2001
From: Carlo Bramini <carlo_bramini@users.sourceforge.net>
Date: Wed, 15 Apr 2026 00:10:03 +0200
Subject: [PATCH] gh-148575: Use the right entry to read the set of file
 descriptors on CYGWIN

This patch fixes issue #148575.
---
 Modules/_posixsubprocess.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Modules/_posixsubprocess.c b/Modules/_posixsubprocess.c
index b7f39ea3d499e4..9867f077faef7a 100644
--- a/Modules/_posixsubprocess.c
+++ b/Modules/_posixsubprocess.c
@@ -63,7 +63,7 @@
 # endif
 #endif
 
-#if defined(__FreeBSD__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__DragonFly__)
+#if defined(__CYGWIN__) || defined(__FreeBSD__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__DragonFly__)
 # define FD_DIR "/dev/fd"
 #else
 # define FD_DIR "/proc/self/fd"