diff --git a/base/src/timer_event_handler.h b/base/src/timer_event_handler.h
index 86c720ae6f319527e7b897455bdaa08963724593..b70843e2ca9bad0eafd2e397eb497a9fdfff72ba 100644
--- a/base/src/timer_event_handler.h
+++ b/base/src/timer_event_handler.h
@@ -31,7 +31,7 @@ class TimerEventHandler : public EventHandler {
 
 public:
     TimerEventHandler(EventReactor* p, uint32_t timeout, bool once);
-    ~TimerEventHandler();
+    ~TimerEventHandler() override;
 
     TimerEventHandler(const TimerEventHandler&) = delete;
     TimerEventHandler& operator=(const TimerEventHandler&) = delete;