diff --git a/rustsbi-k210/src/main.rs b/rustsbi-k210/src/main.rs
index 827207b..8b58ce5 100644
--- a/rustsbi-k210/src/main.rs
+++ b/rustsbi-k210/src/main.rs
@@ -3,7 +3,7 @@
 #![feature(naked_functions)]
 #![feature(generator_trait)]
 #![feature(default_alloc_error_handler)]
-#![feature(asm_sym, asm_const)]
+#![feature(asm_const)]
 
 mod execute;
 mod feature;
diff --git a/test-kernel/src/main.rs b/test-kernel/src/main.rs
index f656e96..11902f1 100644
--- a/test-kernel/src/main.rs
+++ b/test-kernel/src/main.rs
@@ -1,5 +1,5 @@
 #![feature(naked_functions)]
-#![feature(asm_sym, asm_const)]
+#![feature(asm_const)]
 #![feature(generator_trait)]
 #![feature(default_alloc_error_handler)]
 #![feature(stdsimd)]