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-rw-r--r--thread_win32.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/thread_win32.c b/thread_win32.c
index fc31c09ec3..84b8776418 100644
--- a/thread_win32.c
+++ b/thread_win32.c
@@ -842,6 +842,7 @@ native_thread_native_thread_id(rb_thread_t *th)
if (tid == 0) rb_sys_fail("GetThreadId");
return ULONG2NUM(tid);
}
+#define USE_NATIVE_THREAD_NATIVE_THREAD_ID 1
#if USE_MJIT
static unsigned long __stdcall