diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c
index 7a92a5e1d40c6f17227936ee2b6925286deab511..feca75b07fddce01e6e121542d3e0b74d321f85f 100644
--- a/drivers/xen/privcmd.c
+++ b/drivers/xen/privcmd.c
@@ -362,8 +362,8 @@ static int mmap_batch_fn(void *data, int nr, void *state)
 				st->global_error = 1;
 		}
 	}
-	st->va += PAGE_SIZE * nr;
-	st->index += nr;
+	st->va += XEN_PAGE_SIZE * nr;
+	st->index += nr / XEN_PFN_PER_PAGE;
 
 	return 0;
 }