diff --git a/libc-test/semver/freebsd.txt b/libc-test/semver/freebsd.txt
index ec803dda..dacf3c9d 100644
--- a/libc-test/semver/freebsd.txt
+++ b/libc-test/semver/freebsd.txt
@@ -837,6 +837,19 @@ PIOD_READ_I
 PIOD_WRITE_D
 PIOD_WRITE_I
 PIPE_BUF
+PL_EVENT_NONE
+PL_EVENT_SIGNAL
+PL_FLAG_BORN
+PL_FLAG_BOUND
+PL_FLAG_CHILD
+PL_FLAG_EXEC
+PL_FLAG_EXITED
+PL_FLAG_VFORKED
+PL_FLAG_VFORK_DONE
+PL_FLAG_SA
+PL_FLAG_SCE
+PL_FLAG_SCX
+PL_FLAG_SI
 PM_STR
 POLLINIGNEOF
 POLLRDBAND
@@ -1675,6 +1688,7 @@ pthread_spin_unlock
 pthread_spinlock_t
 ptrace
 ptrace_io_desc
+ptrace_lwpinfo
 ptrace_vm_entry
 pututxline
 pwritev
diff --git a/src/unix/bsd/freebsdlike/freebsd/mod.rs b/src/unix/bsd/freebsdlike/freebsd/mod.rs
index 1e825fde..80ebedeb 100644
--- a/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -140,6 +140,19 @@ s! {
         pub pve_path: *mut ::c_char,
     }
 
+    pub struct ptrace_lwpinfo {
+        pub pl_lwpid: lwpid_t,
+        pub pl_event: ::c_int,
+        pub pl_flags: ::c_int,
+        pub pl_sigmask: ::sigset_t,
+        pub pl_siglist: ::sigset_t,
+        pub pl_siginfo: ::siginfo_t,
+        pub pl_tdname: [::c_char; ::MAXCOMLEN as usize + 1],
+        pub pl_child_pid: ::pid_t,
+        pub pl_syscall_code: ::c_uint,
+        pub pl_syscall_narg: ::c_uint,
+    }
+
     pub struct cpuset_t {
         #[cfg(target_pointer_width = "64")]
         __bits: [::c_long; 4],
@@ -1097,6 +1110,21 @@ pub const LOCAL_CREDS_PERSISTENT: ::c_int = 3;
 pub const LOCAL_CONNWAIT: ::c_int = 4;
 pub const LOCAL_VENDOR: ::c_int = SO_VENDOR;
 
+pub const PL_EVENT_NONE: ::c_int = 0;
+pub const PL_EVENT_SIGNAL: ::c_int = 1;
+pub const PL_FLAG_SA: ::c_int = 0x01;
+pub const PL_FLAG_BOUND: ::c_int = 0x02;
+pub const PL_FLAG_SCE: ::c_int = 0x04;
+pub const PL_FLAG_SCX: ::c_int = 0x08;
+pub const PL_FLAG_EXEC: ::c_int = 0x10;
+pub const PL_FLAG_SI: ::c_int = 0x20;
+pub const PL_FLAG_FORKED: ::c_int = 0x40;
+pub const PL_FLAG_CHILD: ::c_int = 0x80;
+pub const PL_FLAG_BORN: ::c_int = 0x100;
+pub const PL_FLAG_EXITED: ::c_int = 0x200;
+pub const PL_FLAG_VFORKED: ::c_int = 0x400;
+pub const PL_FLAG_VFORK_DONE: ::c_int = 0x800;
+
 pub const PT_LWPINFO: ::c_int = 13;
 pub const PT_GETNUMLWPS: ::c_int = 14;
 pub const PT_GETLWPLIST: ::c_int = 15;