diff --git a/src/main.rs b/src/main.rs
index 92164f2..b870494 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -63,6 +63,8 @@ extern "C" fn start() -> ! {
     unsafe { uart::init_console(0x1000_0000) };
     println!("Hello, world!");
 
+    println!("hartid: {}", riscv::register::mhartid::read());
+
     loop {
         let c = uart::CONSOLE.lock().as_mut().and_then(uart::Device::get);
         if let Some(c) = c {