diff --git a/src/scheduler.h b/src/scheduler.h
--- a/src/scheduler.h
+++ b/src/scheduler.h
@@ -99,8 +99,9 @@
     CScheduler *m_pscheduler;
 
     CCriticalSection m_cs_callbacks_pending;
-    std::list<std::function<void(void)>> m_callbacks_pending;
-    bool m_are_callbacks_running = false;
+    std::list<std::function<void(void)>>
+        m_callbacks_pending GUARDED_BY(m_cs_callbacks_pending);
+    bool m_are_callbacks_running GUARDED_BY(m_cs_callbacks_pending) = false;
 
     void MaybeScheduleProcessQueue();
     void ProcessQueue();