diff --git a/src/lib.rs b/src/lib.rs
index e5e6c09..29fe1ab 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-#![no_std] #![feature(naked_functions)]
+#![no_std]
 
 #[cfg(target_arch = "x86_64")]
 mod win64 {
diff --git a/src/win64/misc.rs b/src/win64/misc.rs
index 196e251..630f94d 100644
--- a/src/win64/misc.rs
+++ b/src/win64/misc.rs
@@ -1,4 +1,4 @@
-#[no_mangle] #[naked]
+#[no_mangle] #[unsafe(naked)]
 pub unsafe extern "C" fn __chkstk() {
     core::arch::naked_asm!(
     "push   %rcx",