diff --git a/src/lib.rs b/src/lib.rs
index f9fce29..53562e1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,6 +2,7 @@
 #![feature(const_fn)]
 #![feature(alloc, allocator_api)]
 #![no_std]
+#![feature(ptr_internals)]
 
 extern crate alloc;