diff --git a/runtime/thread.cc b/runtime/thread.cc
index e3feda6..fb24828 100644
--- a/runtime/thread.cc
+++ b/runtime/thread.cc
@@ -740,7 +740,7 @@
   {
     MutexLock mu(nullptr, *Locks::runtime_shutdown_lock_);
     if (runtime->IsShuttingDownLocked()) {
-      LOG(ERROR) << "Thread attaching while runtime is shutting down: " << thread_name;
+      LOG(WARNING) << "Thread attaching while runtime is shutting down: " << thread_name;
       return nullptr;
     } else {
       Runtime::Current()->StartThreadBirth();