diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index ee5e68b..06c540a 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -124,6 +124,7 @@
 	pernodesize += node * L1_CACHE_BYTES;
 	pernodesize += L1_CACHE_ALIGN(sizeof(pg_data_t));
 	pernodesize += L1_CACHE_ALIGN(sizeof(struct ia64_node_data));
+	pernodesize += L1_CACHE_ALIGN(sizeof(pg_data_t));
 	pernodesize = PAGE_ALIGN(pernodesize);
 	return pernodesize;
 }