diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index 93ebedc5ec8ca36357635e774d5ca094d0e70e54..01e89b7ac637f2bf3f8d9dd0e50d7ee923ba34fe 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);