From 4cf0e848beaefd51ad284e574e25a668ba64d152 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Piotr=20Zi=C4=99zio?= <piotr.ziezio@amt.pl>
Date: Tue, 19 Aug 2025 12:47:39 +0200
Subject: [PATCH] Fix SHM driver on x64 Windows

---
 ntpd/refclock_shm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ntpd/refclock_shm.c b/ntpd/refclock_shm.c
index da38355b4c..fc0fbb1523 100644
--- a/ntpd/refclock_shm.c
+++ b/ntpd/refclock_shm.c
@@ -182,7 +182,7 @@ getShmTime(
 		sa.bInheritHandle = FALSE;
 		psec = &sa;
 	}
-	shmid = CreateFileMapping ((HANDLE)0xffffffff, psec, PAGE_READWRITE,
+	shmid = CreateFileMapping (INVALID_HANDLE_VALUE, psec, PAGE_READWRITE,
 				   0, sizeof (struct shmTime), buf);
 	if (shmid == NULL) { /*error*/
 		char buf[1000];