diff --git a/src/lib.rs b/src/lib.rs
index 6dde5144..607bfc7f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,6 @@
 #![feature(maybe_uninit_slice)]
 #![feature(maybe_uninit_uninit_array)]
 #![feature(maybe_uninit_array_assume_init)]
-#![feature(once_cell)]
 #![feature(alloc_error_handler)]
 #![cfg_attr(not(test), no_std)]
 extern crate alloc;
diff --git a/src/main.rs b/src/main.rs
index 8b56b956..94e53e99 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,6 @@
 #![feature(maybe_uninit_uninit_array)]
 #![feature(maybe_uninit_slice)]
 #![feature(maybe_uninit_array_assume_init)]
-#![feature(once_cell)]
 #![feature(alloc_error_handler)]
 #![no_builtins]
 #![no_std]