diff --git a/os/src/sbi.rs b/os/src/sbi.rs
index a402b91a..45f28112 100644
--- a/os/src/sbi.rs
+++ b/os/src/sbi.rs
@@ -40,6 +40,6 @@ pub fn console_getchar() -> usize {
 }
 
 pub fn shutdown(exit_code: usize) -> ! {
-    sbi_call(SBI_SHUTDOWN, 0, 0, 0);
+    sbi_call(SBI_SHUTDOWN, exit_code, 0, 0);
     panic!("It should shutdown!");
 }