From 56333064ac43c177b34db827c467d4cec0540257 Mon Sep 17 00:00:00 2001
From: itsamine27 <amine.abdenader@gmail.com>
Date: Tue, 16 Dec 2025 14:50:14 +0100
Subject: [PATCH] winit-win32: Fix ABI mismatch in INIT_MAIN_THREAD_ID

Fixes #4435.
---
 winit-win32/src/event_loop.rs | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/winit-win32/src/event_loop.rs b/winit-win32/src/event_loop.rs
index e202281b4..925f01f56 100644
--- a/winit-win32/src/event_loop.rs
+++ b/winit-win32/src/event_loop.rs
@@ -528,9 +528,11 @@ fn main_thread_id() -> u32 {
     //
     // See: https://doc.rust-lang.org/stable/reference/abi.html#the-link_section-attribute
     #[unsafe(link_section = ".CRT$XCU")]
-    static INIT_MAIN_THREAD_ID: unsafe fn() = {
-        unsafe fn initer() {
-            unsafe { MAIN_THREAD_ID = GetCurrentThreadId() };
+    static INIT_MAIN_THREAD_ID: unsafe extern "C" fn() = {
+        unsafe extern "C" fn initer() {
+            unsafe {
+                MAIN_THREAD_ID = GetCurrentThreadId();
+            }
         }
         initer
     };