diff --git a/src/system/kernel/vm/VMKernelArea.h b/src/system/kernel/vm/VMKernelArea.h
index 0f64bdbf6d..6cfa7c9b22 100644
--- a/src/system/kernel/vm/VMKernelArea.h
+++ b/src/system/kernel/vm/VMKernelArea.h
@@ -109,7 +109,7 @@ struct VMKernelAddressRangeGetFreeListLink {
 };
 
 
-struct VMKernelArea : VMArea, AVLTreeNode {
+struct VMKernelArea final : VMArea, AVLTreeNode {
 								VMKernelArea(VMAddressSpace* addressSpace,
 									uint32 wiring, uint32 protection);
 								~VMKernelArea();