diff --git a/llvm/utils/benchmark/include/benchmark/benchmark.h b/llvm/utils/benchmark/include/benchmark/benchmark.h
index 3b535f1b7d52..528aa7f9c8bb 100644
--- a/llvm/utils/benchmark/include/benchmark/benchmark.h
+++ b/llvm/utils/benchmark/include/benchmark/benchmark.h
@@ -952,7 +952,7 @@ class FunctionBenchmark : public Benchmark {
   FunctionBenchmark(const char* name, Function* func)
       : Benchmark(name), func_(func) {}
 
-  virtual void Run(State& st);
+  void Run(State& st) override;
 
  private:
   Function* func_;
@@ -962,7 +962,7 @@ class FunctionBenchmark : public Benchmark {
 template <class Lambda>
 class LambdaBenchmark : public Benchmark {
  public:
-  virtual void Run(State& st) { lambda_(st); }
+  void Run(State& st) override { lambda_(st); }
 
  private:
   template <class OLambda>
@@ -1013,7 +1013,7 @@ class Fixture : public internal::Benchmark {
  public:
   Fixture() : internal::Benchmark("") {}
 
-  virtual void Run(State& st) {
+  void Run(State& st) override {
     this->SetUp(st);
     this->BenchmarkCase(st);
     this->TearDown(st);
@@ -1399,8 +1399,8 @@ public:
       : output_options_(opts_), name_field_width_(0),
         prev_counters_(), printed_header_(false) {}
 
-  virtual bool ReportContext(const Context& context);
-  virtual void ReportRuns(const std::vector<Run>& reports);
+  bool ReportContext(const Context& context) override;
+  void ReportRuns(const std::vector<Run>& reports) override;
 
  protected:
   virtual void PrintRunData(const Run& report);
@@ -1415,9 +1415,9 @@ public:
 class JSONReporter : public BenchmarkReporter {
  public:
   JSONReporter() : first_report_(true) {}
-  virtual bool ReportContext(const Context& context);
-  virtual void ReportRuns(const std::vector<Run>& reports);
-  virtual void Finalize();
+  bool ReportContext(const Context& context) override;
+  void ReportRuns(const std::vector<Run>& reports) override;
+  void Finalize() override;
 
  private:
   void PrintRunData(const Run& report);
@@ -1428,8 +1428,8 @@ class JSONReporter : public BenchmarkReporter {
 class CSVReporter : public BenchmarkReporter {
  public:
   CSVReporter() : printed_header_(false) {}
-  virtual bool ReportContext(const Context& context);
-  virtual void ReportRuns(const std::vector<Run>& reports);
+  bool ReportContext(const Context& context) override;
+  void ReportRuns(const std::vector<Run>& reports) override;
 
  private:
   void PrintRunData(const Run& report);