diff --git a/include/rocksdb/system_clock.h b/include/rocksdb/system_clock.h
index 05d3a5ed8..486183d60 100644
--- a/include/rocksdb/system_clock.h
+++ b/include/rocksdb/system_clock.h
@@ -27,7 +27,7 @@ struct ConfigOptions;
 // operating system time-related functionality.
 class SystemClock : public Customizable {
  public:
-  virtual ~SystemClock() {}
+  ~SystemClock() override {}
 
   static const char* Type() { return "SystemClock"; }
   static Status CreateFromString(const ConfigOptions& options,