diff --git a/lib/std/c/freebsd.zig b/lib/std/c/freebsd.zig
index f18a5bfa18..795b9a695e 100644
--- a/lib/std/c/freebsd.zig
+++ b/lib/std/c/freebsd.zig
@@ -1658,6 +1658,45 @@ pub const AT = struct {
     pub const REMOVEDIR = 0x0800;
     /// Fail if not under dirfd
     pub const BENEATH = 0x1000;
+    /// elf_common constants
+    pub const NULL = 0;
+    pub const IGNORE = 1;
+    pub const EXECFD = 2;
+    pub const PHDR = 3;
+    pub const PHENT = 4;
+    pub const PHNUM = 5;
+    pub const PAGESZ = 6;
+    pub const BASE = 7;
+    pub const FLAGS = 8;
+    pub const ENTRY = 9;
+    pub const NOTELF = 10;
+    pub const UID = 11;
+    pub const EUID = 12;
+    pub const GID = 13;
+    pub const EGID = 14;
+    pub const EXECPATH = 15;
+    pub const CANARY = 16;
+    pub const CANARYLEN = 17;
+    pub const OSRELDATE = 18;
+    pub const NCPUS = 19;
+    pub const PAGESIZES = 20;
+    pub const PAGESIZESLEN = 21;
+    pub const TIMEKEEP = 22;
+    pub const STACKPROT = 23;
+    pub const EHDRFLAGS = 24;
+    pub const HWCAP = 25;
+    pub const HWCAP2 = 26;
+    pub const BSDFLAGS = 27;
+    pub const ARGC = 28;
+    pub const ARGV = 29;
+    pub const ENVC = 30;
+    pub const ENVV = 31;
+    pub const PS_STRINGS = 32;
+    pub const FXRNG = 33;
+    pub const KPRLOAD = 34;
+    pub const USRSTACKBASE = 35;
+    pub const USRSTACKLIM = 36;
+    pub const COUNT = 37;
 };
 
 pub const addrinfo = extern struct {
@@ -2151,3 +2190,5 @@ pub const shm_largeconf = extern struct {
 };
 
 pub extern "c" fn shm_create_largepage(path: [*:0]const u8, flags: c_int, psind: c_int, alloc_policy: c_int, mode: mode_t) c_int;
+
+pub extern "c" fn elf_aux_info(aux: c_int, buf: ?*anyopaque, buflen: c_int) c_int;