From dd4d338468002f89958889f99b3fa17426a44ce0 Mon Sep 17 00:00:00 2001
From: Carlo Bramini <carlo_bramini@users.sourceforge.net>
Date: Sun, 12 Apr 2026 19:06:30 +0200
Subject: [PATCH] gh-148461: use arc4random_buf() on CYGWIN

This patch fixes issue #148461.
See also #113141.
---
 Objects/mimalloc/prim/unix/prim.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Objects/mimalloc/prim/unix/prim.c b/Objects/mimalloc/prim/unix/prim.c
index 1598ebabf0a4da..6f78eb72789e8e 100644
--- a/Objects/mimalloc/prim/unix/prim.c
+++ b/Objects/mimalloc/prim/unix/prim.c
@@ -751,7 +751,7 @@ bool _mi_prim_random_buf(void* buf, size_t buf_len) {
 
 #elif defined(__ANDROID__) || defined(__DragonFly__) || \
       defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \
-      defined(__sun)
+      defined(__sun) || defined(__CYGWIN__)
 
 #include <stdlib.h>
 bool _mi_prim_random_buf(void* buf, size_t buf_len) {