diff --git a/vmbase/example/src/main.rs b/vmbase/example/src/main.rs
index 99aca1d..39320fd 100644
--- a/vmbase/example/src/main.rs
+++ b/vmbase/example/src/main.rs
@@ -52,6 +52,9 @@
     println!("Hello world");
     println!("x0={:#010x}, x1={:#010x}, x2={:#010x}, x3={:#010x}", arg0, arg1, arg2, arg3);
     print_addresses();
+    unsafe {
+        assert_eq!(arg0, &dtb_begin as *const u8 as u64);
+    }
     check_data();
 
     unsafe {