diff --git a/docs/src/content/docs/changelog.md b/docs/src/content/docs/changelog.md
index a4eb97db..d45e433e 100644
--- a/docs/src/content/docs/changelog.md
+++ b/docs/src/content/docs/changelog.md
@@ -14,6 +14,10 @@ Requires libvips v8.16.1
 * Ensure `pdfBackground` constructor property is used.
   [#4207](https://github.com/lovell/sharp/pull/4207)
 
+* TypeScript: Ensure `smartDeblock` property is included in WebP definition.
+  [#4387](https://github.com/lovell/sharp/pull/4387)
+  [@Stephen-X](https://github.com/Stephen-X)
+
 ### v0.34.1 - 7th April 2025
 
 * TypeScript: Ensure new `autoOrient` property is optional.