diff --git a/lib/std/elf.zig b/lib/std/elf.zig
index 6c3b748c58..1fbad2837b 100644
--- a/lib/std/elf.zig
+++ b/lib/std/elf.zig
@@ -1480,6 +1480,12 @@ pub const EM = enum(u16) {
     /// Linux kernel bpf virtual machine
     _BPF = 247,
 
+    /// C-SKY
+    _CSKY = 252,
+
+    /// Fujitsu FR-V
+    _FRV = 0x5441,
+
     _,
 };
 
diff --git a/lib/std/os/linux.zig b/lib/std/os/linux.zig
index c1591f7ea1..fe0b71b570 100644
--- a/lib/std/os/linux.zig
+++ b/lib/std/os/linux.zig
@@ -5369,3 +5369,55 @@ pub const PERF = struct {
 
     pub const IOC_FLAG_GROUP = 1;
 };
+
+// TODO: Add the rest of the AUDIT defines?
+pub const AUDIT = struct {
+    pub const ARCH = enum(u32) {
+        const _64BIT = 0x80000000;
+        const _LE = 0x40000000;
+
+        pub const current = switch (native_arch) {
+            .i386 => .I386,
+            .x86_64 => .X86_64,
+            .aarch64 => .AARCH64,
+            .arm, .thumb => .ARM,
+            .riscv64 => .RISCV64,
+            .sparcv9 => .SPARC64,
+            .mips => .MIPS,
+            .mipsel => .MIPSEL,
+            .powerpc => .PPC,
+            .powerpc64 => .PPC64,
+            .powerpc64le => .PPC64LE,
+            else => undefined,
+        };
+
+        AARCH64 = toAudit(.aarch64),
+        ARM = toAudit(.arm),
+        ARMEB = toAudit(.armeb),
+        CSKY = toAudit(.csky),
+        HEXAGON = @enumToInt(std.elf.EM._HEXAGON),
+        I386 = toAudit(.i386),
+        M68K = toAudit(.m68k),
+        MIPS = toAudit(.mips),
+        MIPSEL = toAudit(.mips) | _LE,
+        MIPS64 = toAudit(.mips64),
+        MIPSEL64 = toAudit(.mips64) | _LE,
+        PPC = toAudit(.powerpc),
+        PPC64 = toAudit(.powerpc64),
+        PPC64LE = toAudit(.powerpc64le),
+        RISCV32 = toAudit(.riscv32),
+        RISCV64 = toAudit(.riscv64),
+        S390X = toAudit(.s390x),
+        SPARC = toAudit(.sparc),
+        SPARC64 = toAudit(.sparcv9),
+        X86_64 = toAudit(.x86_64),
+
+        fn toAudit(arch: std.Target.Cpu.Arch) u32 {
+            var res: u32 = @enumToInt(arch.toElfMachine());
+            if (arch.endian() == .Little) res |= _LE;
+            if (arch.ptrBitWidth() == 64) res |= _64BIT;
+
+            return res;
+        }
+    };
+};
diff --git a/lib/std/target.zig b/lib/std/target.zig
index ca1f668ca4..5f22923108 100644
--- a/lib/std/target.zig
+++ b/lib/std/target.zig
@@ -962,7 +962,7 @@ pub const Target = struct {
                     .amdgcn => ._NONE,
                     .bpfel => ._BPF,
                     .bpfeb => ._BPF,
-                    .csky => ._NONE,
+                    .csky => ._CSKY,
                     .sparcv9 => ._SPARCV9,
                     .s390x => ._S390,
                     .ve => ._NONE,