diff --git a/embassy-nrf/src/util.rs b/embassy-nrf/src/util.rs
index d17ec503..2fd0bc5a 100644
--- a/embassy-nrf/src/util.rs
+++ b/embassy-nrf/src/util.rs
@@ -4,13 +4,13 @@ const SRAM_UPPER: usize = 0x3000_0000;
 /// Does this slice reside entirely within RAM?
 pub(crate) fn slice_in_ram<T>(slice: &[T]) -> bool {
     let ptr = slice.as_ptr() as usize;
-    ptr >= SRAM_LOWER && (ptr + slice.len()) < SRAM_UPPER
+    ptr >= SRAM_LOWER && (ptr + slice.len() * core::mem::size_of::<T>()) < SRAM_UPPER
 }
 
 /// Return an error if slice is not in RAM.
 #[cfg(not(feature = "nrf51"))]
 pub(crate) fn slice_in_ram_or<T, E>(slice: &[T], err: E) -> Result<(), E> {
-    if slice.len() == 0 || slice_in_ram(slice) {
+    if slice.is_empty() || slice_in_ram(slice) {
         Ok(())
     } else {
         Err(err)