diff --git a/init/init.cpp b/init/init.cpp
index f964c60..9312f26 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -51,6 +51,7 @@
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
+#include <android-base/thread_annotations.h>
 #include <fs_avb/fs_avb.h>
 #include <fs_mgr_vendor_overlay.h>
 #include <keyutils.h>
@@ -259,7 +260,7 @@
 
   private:
     std::mutex shutdown_command_lock_;
-    std::string shutdown_command_;
+    std::string shutdown_command_ GUARDED_BY(shutdown_command_lock_);
     bool do_shutdown_ = false;
 } shutdown_state;