diff --git a/mm/ksm.c b/mm/ksm.c
index 85bfd4c1634629dc35a2f671c43cd3e2d8c818cc..b6afe0c440d8b3e500f4a09e2875491c7d70199a 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -489,7 +489,7 @@ out:		page = NULL;
  */
 static inline int get_kpfn_nid(unsigned long kpfn)
 {
-	return ksm_merge_across_nodes ? 0 : pfn_to_nid(kpfn);
+	return ksm_merge_across_nodes ? 0 : NUMA(pfn_to_nid(kpfn));
 }
 
 static void remove_node_from_stable_tree(struct stable_node *stable_node)