diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8fbe613d..37c40cb2 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -86,6 +86,7 @@ jobs:
         target: [
           aarch64-kmc-solid_asp3,
           aarch64-unknown-nto-qnx710,
+          aarch64-unknown-nuttx,
           armv6k-nintendo-3ds,
           armv7-sony-vita-newlibeabihf,
           i686-unknown-hurd-gnu,
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 000d9493..7d550305 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.4.4] - UNRELEASED
+### Added
+- Apache NuttX support ([#861])
+
+[0.4.4]: https://github.com/rust-random/getrandom/compare/v0.4.3...master
+[#861]: https://github.com/rust-random/getrandom/pull/861
+
 ## [0.4.3] - 2026-06-17
 ### Added
 - `wasm64-unknown-unknown` target support for `wasm_js` backend [#848]
diff --git a/Cargo.toml b/Cargo.toml
index 0e488c4d..05740be1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -42,11 +42,11 @@ rand_core = { version = "0.10.0", optional = true }
 
 # getrandom / linux_android_with_fallback
 [target.'cfg(all(any(target_os = "linux", target_os = "android"), not(any(all(target_os = "linux", target_env = ""), getrandom_backend = "custom", getrandom_backend = "linux_raw", getrandom_backend = "rdrand", getrandom_backend = "rndr"))))'.dependencies]
-libc = { version = "0.2.154", default-features = false }
+libc = { version = "0.2.176", default-features = false }
 
 # apple-other
 [target.'cfg(any(target_os = "ios", target_os = "visionos", target_os = "watchos", target_os = "tvos"))'.dependencies]
-libc = { version = "0.2.154", default-features = false }
+libc = { version = "0.2.176", default-features = false }
 
 # efi_rng
 [target.'cfg(all(target_os = "uefi", getrandom_backend = "efi_rng"))'.dependencies]
@@ -54,27 +54,27 @@ r-efi = { version = "6", default-features = false }
 
 # getentropy
 [target.'cfg(any(target_os = "macos", target_os = "openbsd", target_os = "vita", target_os = "emscripten"))'.dependencies]
-libc = { version = "0.2.154", default-features = false }
+libc = { version = "0.2.176", default-features = false }
 
 # getrandom
-[target.'cfg(any(target_os = "dragonfly", target_os = "freebsd", target_os = "hurd", target_os = "illumos", target_os = "cygwin", all(target_os = "horizon", target_arch = "arm")))'.dependencies]
-libc = { version = "0.2.154", default-features = false }
+[target.'cfg(any(target_os = "dragonfly", target_os = "freebsd", target_os = "hurd", target_os = "illumos", target_os = "cygwin", target_os = "nuttx", all(target_os = "horizon", target_arch = "arm")))'.dependencies]
+libc = { version = "0.2.176", default-features = false }
 
 # netbsd
 [target.'cfg(target_os = "netbsd")'.dependencies]
-libc = { version = "0.2.154", default-features = false }
+libc = { version = "0.2.176", default-features = false }
 
 # solaris
 [target.'cfg(target_os = "solaris")'.dependencies]
-libc = { version = "0.2.154", default-features = false }
+libc = { version = "0.2.176", default-features = false }
 
 # use_file
 [target.'cfg(any(target_os = "haiku", target_os = "redox", target_os = "nto", target_os = "aix"))'.dependencies]
-libc = { version = "0.2.154", default-features = false }
+libc = { version = "0.2.176", default-features = false }
 
 # vxworks
 [target.'cfg(target_os = "vxworks")'.dependencies]
-libc = { version = "0.2.154", default-features = false }
+libc = { version = "0.2.176", default-features = false }
 
 # wasm_js
 [target.'cfg(all(target_family = "wasm", any(target_os = "unknown", target_os = "none")))'.dependencies]
diff --git a/src/backends.rs b/src/backends.rs
index 86ffd757..ef40894d 100644
--- a/src/backends.rs
+++ b/src/backends.rs
@@ -113,6 +113,7 @@ cfg_if! {
         target_os = "hurd",
         target_os = "illumos",
         target_os = "cygwin",
+        target_os = "nuttx",
         // Check for target_arch = "arm" to only include the 3DS. Does not
         // include the Nintendo Switch (which is target_arch = "aarch64").
         all(target_os = "horizon", target_arch = "arm"),
diff --git a/src/utils/get_errno.rs b/src/utils/get_errno.rs
index 1895fc05..2c68ef9e 100644
--- a/src/utils/get_errno.rs
+++ b/src/utils/get_errno.rs
@@ -1,5 +1,5 @@
 cfg_if! {
-    if #[cfg(any(target_os = "netbsd", target_os = "openbsd", target_os = "android", target_os = "cygwin"))] {
+    if #[cfg(any(target_os = "netbsd", target_os = "openbsd", target_os = "android", target_os = "cygwin", target_os = "nuttx"))] {
         use libc::__errno as errno_location;
     } else if #[cfg(any(target_os = "linux", target_os = "emscripten", target_os = "hurd", target_os = "redox", target_os = "dragonfly"))] {
         use libc::__errno_location as errno_location;