diff --git a/db/version_set.h b/db/version_set.h
index 376b259b9..92a9ed3cd 100644
--- a/db/version_set.h
+++ b/db/version_set.h
@@ -23,6 +23,7 @@
 #include <set>
 #include <vector>
 #include <deque>
+#include <atomic>
 #include "db/dbformat.h"
 #include "db/version_edit.h"
 #include "port/port.h"