diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index 9c1a729cd77e9417995bd8396aaf174bbff280cf..6d74e62bbee0d37125ebc9decc1d342449bbb150 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -86,7 +86,7 @@ static void dax_set_mapping(struct vm_fault *vmf, pfn_t pfn,
 		nr_pages = 1;
 
 	pgoff = linear_page_index(vmf->vma,
-			ALIGN(vmf->address, fault_size));
+			ALIGN_DOWN(vmf->address, fault_size));
 
 	for (i = 0; i < nr_pages; i++) {
 		struct page *page = pfn_to_page(pfn_t_to_pfn(pfn) + i);