diff --git a/crash_reporter/user_collector.h b/crash_reporter/user_collector.h
index 3658e51..9f1bb9c 100644
--- a/crash_reporter/user_collector.h
+++ b/crash_reporter/user_collector.h
@@ -31,7 +31,7 @@
                   IsFeedbackAllowedFunction is_metrics_allowed,
                   bool generate_diagnostics);
 
-  virtual ~UserCollector();
+  ~UserCollector() override;
 
   // Enable collection.
   bool Enable() { return SetUpInternal(true); }