diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index 77ecf01..0166542 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -13,5 +13,7 @@
 * added `double:dip`
 * added `double:sip`
 * default build is now 64-bit
+* mem: now uses single cells (rick c)
+* mem: now requires 64-bit (rick c)
 
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