diff --git a/util/mkimage.c b/util/mkimage.c
index e22d82afa..b2f43fea6 100644
--- a/util/mkimage.c
+++ b/util/mkimage.c
@@ -829,7 +829,7 @@ grub_install_generate_image (const char *dir, const char *prefix,
 
   if (dtb_path)
     {
-      dtb_size = ALIGN_UP(grub_util_get_image_size (dtb_path), 4);
+      dtb_size = ALIGN_ADDR(grub_util_get_image_size (dtb_path));
       total_module_size += dtb_size + sizeof (struct grub_module_header);
     }