diff --git a/CHANGELOG.md b/CHANGELOG.md
index 11d7d3b40f..df801023d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,9 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Added `mkfifoat`
   ([#1133](https://github.com/nix-rust/nix/pull/1133))
 
+- Added optional `Signal` argument to `ptrace::{detach, syscall}` for signal
+  injection. ([#1083](https://github.com/nix-rust/nix/pull/1083))
+
 ### Changed
 - `sys::socket::recvfrom` now returns
   `Result<(usize, Option<SockAddr>)>` instead of `Result<(usize, SockAddr)>`.