diff --git a/CHANGES.md b/CHANGES.md
index de85bd8..5f9341d 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -8,7 +8,11 @@
 
 ### Style
 
-<!-- Changes that affect Black's style -->
+<!-- Changes that affect Black's stable style -->
+
+### Preview style
+
+<!-- Changes that affect Black's preview style -->
 
 ### _Blackd_
 
diff --git a/docs/contributing/release_process.md b/docs/contributing/release_process.md
index 89beb09..6a4b868 100644
--- a/docs/contributing/release_process.md
+++ b/docs/contributing/release_process.md
@@ -47,7 +47,11 @@ Use the following template for a clean changelog after the release:
 
 ### Style
 
-<!-- Changes that affect Black's style -->
+<!-- Changes that affect Black's stable style -->
+
+### Preview style
+
+<!-- Changes that affect Black's preview style -->
 
 ### _Blackd_