diff --git a/chapters/interfaces.txt b/chapters/interfaces.txt
index 58c96281..5329db69 100644
--- a/chapters/interfaces.txt
+++ b/chapters/interfaces.txt
@@ -928,8 +928,8 @@ requirements below.
 If the feature is not enabled, they must adhere to the stricter
 <<interfaces-base-block-layout, Base Alignment>>.
 
-[WARNING]
-.Performance Note
+[NOTE]
+.Note
 ====
 Even if scalar alignment is supported, it is generally more performant to
 use the _base alignment_.