diff --git a/lib/std/c/darwin.zig b/lib/std/c/darwin.zig
index f1f706fa6c..afa50c4286 100644
--- a/lib/std/c/darwin.zig
+++ b/lib/std/c/darwin.zig
@@ -4159,15 +4159,3 @@ pub const PTHREAD_STACK_MIN = switch (builtin.cpu.arch) {
     .arm, .aarch64 => 16 * 1024,
     else => 8 * 1024,
 };
-
-pub const _SYS_NAMELEN = 256;
-
-pub const utsname = extern struct {
-    sysname: [255:0]u8,
-    nodename: [255:0]u8,
-    release: [255:0]u8,
-    version: [255:0]u8,
-    machine: [255:0]u8,
-};
-
-pub extern "c" fn uname(u: *utsname) c_int;
diff --git a/lib/std/c/freebsd.zig b/lib/std/c/freebsd.zig
index 546df22a1d..8c7548e174 100644
--- a/lib/std/c/freebsd.zig
+++ b/lib/std/c/freebsd.zig
@@ -2824,15 +2824,3 @@ pub const PTHREAD_STACK_MIN = switch (builtin.cpu.arch) {
     .x86, .powerpc => 4 * 512,
     else => 4 * 1024,
 };
-
-pub const SYS_NMLN = 256;
-
-pub const utsname = extern struct {
-    sysname: [255:0]u8,
-    nodename: [255:0]u8,
-    release: [255:0]u8,
-    version: [255:0]u8,
-    machine: [255:0]u8,
-};
-
-pub extern "c" fn uname(u: *utsname) c_int;