diff --git a/build/clang-plugin/ThreadAllows.txt b/build/clang-plugin/ThreadAllows.txt
index bae299e3a093..54e22d235a65 100644
--- a/build/clang-plugin/ThreadAllows.txt
+++ b/build/clang-plugin/ThreadAllows.txt
@@ -82,6 +82,7 @@ TestThreadsMain
 Testing Thread
 Timer Thread
 ToastBgThread
+TRR Background
 URL Classifier
 Update Watcher
 VsyncIOThread