diff --git a/src/test/scoped_timer.cpp b/src/test/scoped_timer.cpp
index d65034135..ff9d52b06 100644
--- a/src/test/scoped_timer.cpp
+++ b/src/test/scoped_timer.cpp
@@ -8,6 +8,7 @@
 #include "util/vector.h"
 #include "util/trace.h"
 #include <thread>
+#include <atomic>
 
 class test_scoped_eh : public event_handler {
     std::atomic<bool> m_called = false;