diff --git a/source/common/thread_safe_monotonic_time_stopwatch.h b/source/common/thread_safe_monotonic_time_stopwatch.h
index 2e7b57d44..0d2e1e487 100644
--- a/source/common/thread_safe_monotonic_time_stopwatch.h
+++ b/source/common/thread_safe_monotonic_time_stopwatch.h
@@ -34,7 +34,7 @@ class ThreadSafeMontonicTimeStopwatch : public Stopwatch {
 
 private:
   Envoy::Thread::MutexBasicLockable lock_;
-  Envoy::MonotonicTime start_ GUARDED_BY(lock_);
+  Envoy::MonotonicTime start_ ABSL_GUARDED_BY(lock_);
 };
 
-} // namespace Nighthawk
\ No newline at end of file
+} // namespace Nighthawk