diff --git a/CHANGELOG.md b/CHANGELOG.md
index f6460bf9..1fdc728d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,13 @@ PyO3 versions, please see the [migration guide](https://pyo3.rs/master/migration
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+### Added
+### Changed
+### Removed
+### Fixed
+- Fix building for a 32-bit Python on 64-bit Windows with a 64-bit Rust toolchain. [#1179](https://github.com/PyO3/pyo3/pull/1179)
+
 ## [0.12.0] - 2020-10-12
 ### Added
 - Add FFI definitions `Py_FinalizeEx`, `PyOS_getsig`, and `PyOS_setsig`. [#1021](https://github.com/PyO3/pyo3/pull/1021)