diff --git a/src/lib.rs b/src/lib.rs
index e0ee4ccd..a0d156c7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,5 @@
 #![no_std]
-#![feature(allocator_api, alloc_error_handler, const_fn, const_raw_ptr_deref)]
+#![feature(allocator_api, alloc_error_handler, const_raw_ptr_deref)]
 
 extern crate alloc;