diff --git a/libc-test/semver/linux-musl.txt b/libc-test/semver/linux-musl.txt
index e873cb21d0491..b775cec7182d9 100644
--- a/libc-test/semver/linux-musl.txt
+++ b/libc-test/semver/linux-musl.txt
@@ -80,6 +80,8 @@ getloadavg
 lio_listio
 ntptimeval
 open_wmemstream
+posix_spawn_file_actions_addchdir_np
+posix_spawn_file_actions_addfchdir_np
 preadv2
 preadv64
 prlimit
diff --git a/src/unix/linux_like/linux/musl/mod.rs b/src/unix/linux_like/linux/musl/mod.rs
index 72bd335360b8e..14e1e6d3bfd0f 100644
--- a/src/unix/linux_like/linux/musl/mod.rs
+++ b/src/unix/linux_like/linux/musl/mod.rs
@@ -983,6 +983,17 @@ extern "C" {
 
     pub fn dirname(path: *mut ::c_char) -> *mut ::c_char;
     pub fn basename(path: *mut ::c_char) -> *mut ::c_char;
+
+    // Added in `musl` 1.1.24
+    pub fn posix_spawn_file_actions_addchdir_np(
+        actions: *mut ::posix_spawn_file_actions_t,
+        path: *const ::c_char,
+    ) -> ::c_int;
+    // Added in `musl` 1.1.24
+    pub fn posix_spawn_file_actions_addfchdir_np(
+        actions: *mut ::posix_spawn_file_actions_t,
+        fd: ::c_int,
+    ) -> ::c_int;
 }
 
 // Alias <foo> to <foo>64 to mimic glibc's LFS64 support