diff --git a/CHANGELOG.md b/CHANGELOG.md
index 209d2e98..19aea09c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.2.17] - unreleased
+### Fixed
+- `BCryptGenRandom` signature [#778]
+
+[#778]: https://github.com/rust-random/getrandom/pull/778
+
 ## [0.2.16] - 2025-04-22
 ### Added
 - Cygwin support (backport of [#626]) [#654]
@@ -461,6 +467,7 @@ Publish initial implementation.
 ## [0.0.0] - 2019-01-19
 Publish an empty template library.
 
+[0.2.17]: https://github.com/rust-random/getrandom/compare/v0.2.16...v0.2.17
 [0.2.16]: https://github.com/rust-random/getrandom/compare/v0.2.15...v0.2.16
 [0.2.15]: https://github.com/rust-random/getrandom/compare/v0.2.14...v0.2.15
 [0.2.14]: https://github.com/rust-random/getrandom/compare/v0.2.13...v0.2.14
diff --git a/src/windows.rs b/src/windows.rs
index 2d1c4835..fa4ba03c 100644
--- a/src/windows.rs
+++ b/src/windows.rs
@@ -11,7 +11,7 @@ extern "system" {
         pBuffer: *mut u8,
         cbBuffer: u32,
         dwFlags: u32,
-    ) -> u32;
+    ) -> i32;
 }
 
 // Forbidden when targetting UWP
@@ -34,6 +34,7 @@ pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
                 BCRYPT_USE_SYSTEM_PREFERRED_RNG,
             )
         };
+        let ret = ret as u32;
         // NTSTATUS codes use the two highest bits for severity status.
         if ret >> 30 == 0b11 {
             // Failed. Try RtlGenRandom as a fallback.