diff --git a/tools/gn/bootstrap/bootstrap.py b/tools/gn/bootstrap/bootstrap.py
index 5296ff3..6a6d12d 100755
--- a/tools/gn/bootstrap/bootstrap.py
+++ b/tools/gn/bootstrap/bootstrap.py
@@ -267,6 +267,7 @@
       'base/trace_event/trace_log.cc',
       'base/trace_event/trace_log_constants.cc',
       'base/trace_event/trace_sampling_thread.cc',
+      'base/trace_event/tracing_agent.cc',
       'base/tracked_objects.cc',
       'base/tracking_info.cc',
       'base/values.cc',