diff --git a/pvmfw/src/main.rs b/pvmfw/src/main.rs
index 280e1ce..0d71f6e 100644
--- a/pvmfw/src/main.rs
+++ b/pvmfw/src/main.rs
@@ -27,7 +27,7 @@
 pub fn main(fdt_address: u64, payload_start: u64, payload_size: u64, arg3: u64) {
     println!("pVM firmware");
     println!(
-        "fdt_address={:#010x}, payload_start={:#010x}, payload_size={:#010x}, x3={:#010x}",
+        "fdt_address={:#018x}, payload_start={:#018x}, payload_size={:#018x}, x3={:#018x}",
         fdt_address, payload_start, payload_size, arg3,
     );
 }
diff --git a/vmbase/example/src/main.rs b/vmbase/example/src/main.rs
index 99aca1d..3a1de08 100644
--- a/vmbase/example/src/main.rs
+++ b/vmbase/example/src/main.rs
@@ -50,8 +50,11 @@
 /// Entry point for VM bootloader.
 pub fn main(arg0: u64, arg1: u64, arg2: u64, arg3: u64) {
     println!("Hello world");
-    println!("x0={:#010x}, x1={:#010x}, x2={:#010x}, x3={:#010x}", arg0, arg1, arg2, arg3);
+    println!("x0={:#018x}, x1={:#018x}, x2={:#018x}, x3={:#018x}", arg0, arg1, arg2, arg3);
     print_addresses();
+    unsafe {
+        assert_eq!(arg0, &dtb_begin as *const u8 as u64);
+    }
     check_data();
 
     unsafe {