From d96fe0730fe573872794d688eb2ffc19eed8fee1 Mon Sep 17 00:00:00 2001
From: "Erik M. Bray" <erik.bray@lri.fr>
Date: Thu, 26 Oct 2017 17:38:20 +0200
Subject: [PATCH] Cygwin: ioctl is found in sys/ioctl.h

---
 Modules/socketmodule.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 0758f9bd4099c1..6f114efe31eddf 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -234,7 +234,7 @@ if_indextoname(index) -- return the corresponding interface name\n\
 # include <ctype.h>
 #endif
 
-#ifdef __APPLE__
+#if defined(__APPLE__) || defined(__CYGWIN__)
 # include <sys/ioctl.h>
 #endif