diff --git a/RELEASE_NOTES.rst b/RELEASE_NOTES.rst
index 7b9899d71..c6970f71d 100644
--- a/RELEASE_NOTES.rst
+++ b/RELEASE_NOTES.rst
@@ -11,6 +11,7 @@ Highlights:
 * Performance improvements:
   - #1432: SERDES TTL inputs can now detect edges on pulses that are shorter
     than the RTIO period
+  - Improved performance for kernel RPC involving list and array.
 * Coredevice SI to mu conversions now always return valid codes, or raise a `ValueError`.
 * Zotino now exposes `voltage_to_mu()`
 * `ad9910`: The maximum amplitude scale factor is now `0x3fff` (was `0x3ffe`