diff --git a/BUILD.gn b/BUILD.gn
index 6c99a60..582e515 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -236,6 +236,7 @@
     "update_manager/staging_utils.cc",
     "update_manager/state_factory.cc",
     "update_manager/update_manager.cc",
+    "update_manager/update_time_restrictions_monitor.cc",
     "update_manager/update_time_restrictions_policy_impl.cc",
     "update_manager/weekly_time.cc",
     "update_status_utils.cc",
@@ -537,6 +538,7 @@
       "update_manager/real_updater_provider_unittest.cc",
       "update_manager/staging_utils_unittest.cc",
       "update_manager/update_manager_unittest.cc",
+      "update_manager/update_time_restrictions_monitor_unittest.cc",
       "update_manager/update_time_restrictions_policy_impl_unittest.cc",
       "update_manager/variable_unittest.cc",
       "update_manager/weekly_time_unittest.cc",