diff --git a/mm/Kconfig b/mm/Kconfig
index 527136b..f4e516e 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -128,6 +128,9 @@
 	 pfn_to_page and page_to_pfn operations.  This is the most
 	 efficient option when sufficient kernel resources are available.
 
+config HAVE_MEMBLOCK
+	boolean
+
 # eventually, we can have this option just 'select SPARSEMEM'
 config MEMORY_HOTPLUG
 	bool "Allow for memory hot-add"