diff --git a/src/cmo.adoc b/src/cmo.adoc
index 32322ba18..6dbc555ff 100644
--- a/src/cmo.adoc
+++ b/src/cmo.adoc
@@ -772,6 +772,13 @@ The following instructions comprise the Zicbom extension:
 
 |===
 
+[NOTE]
+====
+_Cache-block management instructions operate on the cache block independently
+of whether Page-Based Memory Types (PBMT) downgrade the memory attribute
+to non-cacheable._
+====
+
 [#Zicboz,reftext="Cache-Block Zero Instructions"]
 ==== Cache-Block Zero Instructions