diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 8104e5a..2496879 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -168,6 +168,8 @@
 int hugetlb_get_quota(struct address_space *mapping, long delta);
 void hugetlb_put_quota(struct address_space *mapping, long delta);
 
+#define BLOCKS_PER_HUGEPAGE	(HPAGE_SIZE / 512)
+
 static inline int is_file_hugepages(struct file *file)
 {
 	if (file->f_op == &hugetlbfs_file_operations)