diff --git a/runtime/thread_list.h b/runtime/thread_list.h
index df81ad1..49f65e1 100644
--- a/runtime/thread_list.h
+++ b/runtime/thread_list.h
@@ -144,6 +144,10 @@
   void VisitRoots(RootVisitor* visitor) const
       SHARED_REQUIRES(Locks::mutator_lock_);
 
+  void VisitRootsForSuspendedThreads(RootVisitor* visitor)
+      REQUIRES(!Locks::thread_list_lock_, !Locks::thread_suspend_count_lock_)
+      SHARED_REQUIRES(Locks::mutator_lock_);
+
   // Return a copy of the thread list.
   std::list<Thread*> GetList() REQUIRES(Locks::thread_list_lock_) {
     return list_;