diff --git a/os/src/main.rs b/os/src/main.rs
index 5b69805b1381ae736c280ab056ae59c15ea79649..5f4c11c9042a5fc899a3329bacc0f1b62331ec84 100644
--- a/os/src/main.rs
+++ b/os/src/main.rs
@@ -7,6 +7,6 @@ mod lang_items;
 global_asm!(include_str!("entry.asm"));
 
 #[no_mangle]
-pub extern "C" fn rust_main() -> ! {
+pub fn rust_main() -> ! {
     loop {}
 }
\ No newline at end of file