diff --git a/libc-test/semver/unix.txt b/libc-test/semver/unix.txt
index 5e84434b46bf4..03248dfec58c7 100644
--- a/libc-test/semver/unix.txt
+++ b/libc-test/semver/unix.txt
@@ -687,6 +687,7 @@ pthread_condattr_init
 pthread_condattr_t
 pthread_create
 pthread_detach
+pthread_equal
 pthread_exit
 pthread_getspecific
 pthread_join
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index b67b5a93e3541..487a15dde90c5 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -1030,6 +1030,7 @@ extern "C" {
     pub fn times(buf: *mut ::tms) -> ::clock_t;
 
     pub fn pthread_self() -> ::pthread_t;
+    pub fn pthread_equal(t1: ::pthread_t, t2: ::pthread_t) -> ::c_int;
     #[cfg_attr(
         all(target_os = "macos", target_arch = "x86"),
         link_name = "pthread_join$UNIX2003"