diff --git a/libc-test/semver/freebsd.txt b/libc-test/semver/freebsd.txt
index 99748fe84be5..110e75e2bca1 100644
--- a/libc-test/semver/freebsd.txt
+++ b/libc-test/semver/freebsd.txt
@@ -2232,6 +2232,7 @@ pthread_spin_lock
 pthread_spin_trylock
 pthread_spin_unlock
 pthread_spinlock_t
+pthread_timedjoin_np
 ptrace
 ptrace_io_desc
 ptrace_lwpinfo
diff --git a/libc-test/semver/linux-gnu.txt b/libc-test/semver/linux-gnu.txt
index 64e87bf9fc13..56bffa7f289e 100644
--- a/libc-test/semver/linux-gnu.txt
+++ b/libc-test/semver/linux-gnu.txt
@@ -657,6 +657,8 @@ pthread_attr_setaffinity_np
 pthread_rwlockattr_getkind_np
 pthread_rwlockattr_getpshared
 pthread_rwlockattr_setkind_np
+pthread_timedjoin_np
+pthread_tryjoin_np
 ptrace_peeksiginfo_args
 ptrace_sud_config
 ptrace_syscall_info
diff --git a/libc-test/semver/linux-musl.txt b/libc-test/semver/linux-musl.txt
index fb89d83a3804..6f94aaa1c5ff 100644
--- a/libc-test/semver/linux-musl.txt
+++ b/libc-test/semver/linux-musl.txt
@@ -81,6 +81,7 @@ prlimit
 prlimit64
 process_vm_readv
 process_vm_writev
+pthread_timedjoin_np
 pututxline
 pwritev2
 pwritev64
diff --git a/src/unix/bsd/freebsdlike/freebsd/mod.rs b/src/unix/bsd/freebsdlike/freebsd/mod.rs
index 136a29e6b419..2e893b58d3c6 100644
--- a/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -4549,6 +4549,12 @@ extern "C" {
     pub fn pthread_spin_trylock(lock: *mut pthread_spinlock_t) -> c_int;
     pub fn pthread_spin_unlock(lock: *mut pthread_spinlock_t) -> c_int;
 
+    pub fn pthread_timedjoin_np(
+        thread: crate::pthread_t,
+        retval: *mut *mut c_void,
+        abstime: *const crate::timespec,
+    ) -> c_int;
+
     #[cfg_attr(all(target_os = "freebsd", freebsd11), link_name = "statfs@FBSD_1.0")]
     pub fn statfs(path: *const c_char, buf: *mut statfs) -> c_int;
     #[cfg_attr(all(target_os = "freebsd", freebsd11), link_name = "fstatfs@FBSD_1.0")]
diff --git a/src/unix/linux_like/linux/gnu/mod.rs b/src/unix/linux_like/linux/gnu/mod.rs
index 0951dcfc70c5..a51f78392a5e 100644
--- a/src/unix/linux_like/linux/gnu/mod.rs
+++ b/src/unix/linux_like/linux/gnu/mod.rs
@@ -1115,6 +1115,16 @@ extern "C" {
         val: c_int,
     ) -> c_int;
     pub fn pthread_sigqueue(thread: crate::pthread_t, sig: c_int, value: crate::sigval) -> c_int;
+    pub fn pthread_tryjoin_np(thread: crate::pthread_t, retval: *mut *mut c_void) -> c_int;
+    #[cfg_attr(
+        all(target_pointer_width = "32", gnu_time_bits64),
+        link_name = "__pthread_timedjoin_np64"
+    )]
+    pub fn pthread_timedjoin_np(
+        thread: crate::pthread_t,
+        retval: *mut *mut c_void,
+        abstime: *const crate::timespec,
+    ) -> c_int;
     pub fn mallinfo() -> crate::mallinfo;
     pub fn mallinfo2() -> crate::mallinfo2;
     pub fn malloc_stats();
diff --git a/src/unix/linux_like/linux/musl/mod.rs b/src/unix/linux_like/linux/musl/mod.rs
index 2fe0440eb43f..f16efaac7ecc 100644
--- a/src/unix/linux_like/linux/musl/mod.rs
+++ b/src/unix/linux_like/linux/musl/mod.rs
@@ -869,6 +869,16 @@ extern "C" {
         note = "musl provides `utmp` as stubs and an alternative should be preferred; see https://wiki.musl-libc.org/faq.html"
     )]
     pub fn utmpxname(file: *const c_char) -> c_int;
+    pub fn pthread_tryjoin_np(thread: crate::pthread_t, retval: *mut *mut c_void) -> c_int;
+    #[cfg_attr(
+        all(musl32_time64, target_pointer_width = "32"),
+        link_name = "__pthread_timedjoin_np_time64"
+    )]
+    pub fn pthread_timedjoin_np(
+        thread: crate::pthread_t,
+        retval: *mut *mut c_void,
+        abstime: *const crate::timespec,
+    ) -> c_int;
 }
 
 // Alias <foo> to <foo>64 to mimic glibc's LFS64 support