diff --git a/embassy-nrf/src/lib.rs b/embassy-nrf/src/lib.rs
index a9df231e..b448f6ab 100644
--- a/embassy-nrf/src/lib.rs
+++ b/embassy-nrf/src/lib.rs
@@ -1,7 +1,7 @@
 #![no_std]
 #![cfg_attr(
     feature = "nightly",
-    feature(generic_associated_types, type_alias_impl_trait, slice_ptr_len)
+    feature(generic_associated_types, type_alias_impl_trait)
 )]
 
 #[cfg(not(any(
diff --git a/embassy-nrf/src/util.rs b/embassy-nrf/src/util.rs
index 84848e87..42265dc2 100644
--- a/embassy-nrf/src/util.rs
+++ b/embassy-nrf/src/util.rs
@@ -22,7 +22,8 @@ pub(crate) fn slice_in_ram<T>(slice: *const [T]) -> bool {
 /// Return an error if slice is not in RAM. Skips check if slice is zero-length.
 #[cfg(not(feature = "nrf51"))]
 pub(crate) fn slice_in_ram_or<T, E>(slice: *const [T], err: E) -> Result<(), E> {
-    if slice.len() > 0 && slice_in_ram(slice) {
+    let (_, len) = slice_ptr_parts(slice);
+    if len > 0 && slice_in_ram(slice) {
         Ok(())
     } else {
         Err(err)