diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a43534a33..726e10ec86 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,7 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
-- All filter functions in `plugins/autograd` now accept either an absolute size in pixels or a `radius` and `dl` argument.
+- All filter functions in `plugins/autograd` now accept either an absolute size in pixels (renamed from `size` to `size_px`) or a `radius` and `dl` argument.
 
 ### Fixed
 - Bug where boundary layers would be plotted too small in 2D simulations.