diff --git a/base/threading/platform_thread.cc b/base/threading/platform_thread.cc
index 3dc218163..f167af4ff 100644
--- a/base/threading/platform_thread.cc
+++ b/base/threading/platform_thread.cc
@@ -4,6 +4,7 @@
 
 #include "base/threading/platform_thread.h"
 
+#include <atomic>
 #include <memory>
 
 #include "base/feature_list.h"