diff --git a/lib/std/c/freebsd.zig b/lib/std/c/freebsd.zig
index c0d5d626c2..fde54467d0 100644
--- a/lib/std/c/freebsd.zig
+++ b/lib/std/c/freebsd.zig
@@ -1391,47 +1391,15 @@ pub const mcontext_t = switch (builtin.cpu.arch) {
         rflags: u64,
         rsp: u64,
         ss: u64,
-        len: c_long,
-        fpformat: c_long,
-        ownedfp: c_long,
-        fpstate: [64]c_long align(16),
+        len: u64,
+        fpformat: u64,
+        ownedfp: u64,
+        fpstate: [64]u64 align(16),
         fsbase: u64,
         gsbase: u64,
         xfpustate: u64,
         xfpustate_len: u64,
-        spare: [4]c_long,
-    },
-    .x86 => extern struct {
-        onstack: u32,
-        gs: u32,
-        fs: u32,
-        es: u32,
-        ds: u32,
-        edi: u32,
-        esi: u32,
-        ebp: u32,
-        isp: u32,
-        ebx: u32,
-        edx: u32,
-        ecx: u32,
-        eax: u32,
-        trapno: u32,
-        err: u32,
-        eip: u32,
-        cs: u32,
-        eflags: u32,
-        esp: u32,
-        ss: u32,
-        len: c_int,
-        fpformat: c_int,
-        ownedfp: c_int,
-        flags: u32,
-        fpstate: [128]c_int align(16),
-        fsbase: u32,
-        gsbase: u32,
-        xpustate: u32,
-        xpustate_len: u32,
-        spare2: [4]c_int,
+        spare: [4]u64,
     },
     .aarch64 => extern struct {
         gpregs: extern struct {