diff --git a/CHANGELOG.md b/CHANGELOG.md
index 145a59837..6912cec8c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
+## [Unreleased]
+
 ## [1.12.0] - 2025-02-06
 
 ### Fixed
diff --git a/src/vscode-split-layout/vscode-split-layout.ts b/src/vscode-split-layout/vscode-split-layout.ts
index 581394998..96b52a1f9 100644
--- a/src/vscode-split-layout/vscode-split-layout.ts
+++ b/src/vscode-split-layout/vscode-split-layout.ts
@@ -61,6 +61,8 @@ export type VscSplitLayoutChangeEvent = CustomEvent<{
 /**
  * @tag vscode-split-layout
  *
+ * @prop {'start' | 'end' | 'none'} fixedPane
+ *
  * @cssprop [--hover-border=var(--vscode-sash-hoverBorder)]
  */
 @customElement('vscode-split-layout')