diff --git a/CHANGELOG.md b/CHANGELOG.md
index 027a6d794d..b5d942bb46 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -81,6 +81,10 @@ Changes to `Swapchain`:
 Changes to samplers:
 - The `sampler` module is now a submodule of `image`.
 
+Changes to `Format`:
+- The following objects now use `Format` instead of `Option<Format>`: `BufferView`, `Image`, `ImageView`, `SamplerYcbcrConversion`.
+- The `block_size` method no longer returns an `Option`.
+
 ### Additions
 
 - Vulkano-shaders: Added a `root_path_env` property to allow loading shaders generated by a build script.
@@ -103,6 +107,7 @@ Changes to samplers:
 - Added `ImageCreateFlags::EXTENDED_USAGE` from the `khr_maintenance2` extension.
 - Support for the `ext_image_drm_format_modifier` extension.
 - Support for the `ext_image_2d_view_of_3d` extension.
+- Added `Format::UNDEFINED`, and implemented `Default` which returns this value.
 
 ### Bugs fixed