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-rw-r--r--base/cancellation_flag.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/base/cancellation_flag.h b/base/cancellation_flag.h
index b9c045d..98ca846 100644
--- a/base/cancellation_flag.h
+++ b/base/cancellation_flag.h
@@ -4,6 +4,7 @@
#ifndef BASE_CANCELLATION_FLAG_H_
#define BASE_CANCELLATION_FLAG_H_
+#pragma once
#include "base/atomicops.h"
#include "base/platform_thread.h"