diff --git a/grub-core/loader/efi/fdt.c b/grub-core/loader/efi/fdt.c
index a4c6e8036..a18ca8ccb 100644
--- a/grub-core/loader/efi/fdt.c
+++ b/grub-core/loader/efi/fdt.c
@@ -123,7 +123,7 @@ grub_cmd_devicetree (grub_command_t cmd __attribute__ ((unused)),
       return GRUB_ERR_NONE;
     }
 
-  dtb = grub_file_open (argv[0]);
+  dtb = grub_file_open (argv[0], GRUB_FILE_TYPE_DEVICE_TREE_IMAGE);
   if (!dtb)
     goto out;