diff --git a/Kernel/VM/VMObject.h b/Kernel/VM/VMObject.h
index 3528eda0b4..7d2960328b 100644
--- a/Kernel/VM/VMObject.h
+++ b/Kernel/VM/VMObject.h
@@ -67,10 +67,12 @@ public:
 
     void register_on_deleted_handler(VMObjectDeletedHandler& handler)
     {
+        ScopedSpinLock locker(m_on_deleted_lock);
         m_on_deleted.set(&handler);
     }
     void unregister_on_deleted_handler(VMObjectDeletedHandler& handler)
     {
+        ScopedSpinLock locker(m_on_deleted_lock);
         m_on_deleted.remove(&handler);
     }