diff --git a/src/lib.rs b/src/lib.rs
index 8ed5498..95891f4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -8,7 +8,7 @@
 #![no_std]
 #![cfg_attr(feature = "unstable", feature(core_intrinsics))]
 #![cfg_attr(feature = "unstable", feature(const_generics))]
-#![cfg_attr(feature = "unstable", feature(slice_check_range))]
+#![cfg_attr(feature = "unstable", feature(range_bounds_assert_len))]
 #![cfg_attr(feature = "unstable", allow(incomplete_features))]
 #![warn(missing_docs)]
 
@@ -25,7 +25,6 @@ use core::{
 use core::{
     intrinsics,
     ops::{Range, RangeBounds},
-    slice,
 };
 
 /// Allows creating read-only and write-only `Volatile` values.
@@ -625,7 +624,7 @@ where
         let Range {
             start: src_start,
             end: src_end,
-        } = slice::check_range(self.reference.len(), src);
+        } = src.assert_len(self.reference.len());
         let count = src_end - src_start;
         assert!(
             dest <= self.reference.len() - count,