diff --git a/lib/std/builtin.zig b/lib/std/builtin.zig
index 7b66998dc13e9022e2c221ca9ae86ef5efcd3534..f38fc4e1559defc4ac119c35b06552e5fc362665 100644
--- a/lib/std/builtin.zig
+++ b/lib/std/builtin.zig
@@ -716,6 +716,9 @@ pub const CompilerBackend = enum(u64) {
     /// The reference implementation self-hosted compiler of Zig, using the
     /// riscv64 backend.
     stage2_riscv64 = 9,
+    /// The reference implementation self-hosted compiler of Zig, using the
+    /// sparcv9 backend.
+    stage2_sparcv9 = 10,
 
     _,
 };
@@ -761,7 +764,8 @@ pub fn default_panic(msg: []const u8, error_return_trace: ?*StackTrace) noreturn
         builtin.zig_backend == .stage2_aarch64 or
         builtin.zig_backend == .stage2_x86_64 or
         builtin.zig_backend == .stage2_x86 or
-        builtin.zig_backend == .stage2_riscv64)
+        builtin.zig_backend == .stage2_riscv64 or
+        builtin.zig_backend == .stage2_sparcv9)
     {
         while (true) {
             @breakpoint();
diff --git a/lib/std/start.zig b/lib/std/start.zig
index cd247c915edba69c8e6db5e1b4cafa3f6c04b005..20f369476d06d9c637c0c434e1cf33dcc135076a 100644
--- a/lib/std/start.zig
+++ b/lib/std/start.zig
@@ -29,6 +29,7 @@ comptime {
         builtin.zig_backend == .stage2_aarch64 or
         builtin.zig_backend == .stage2_arm or
         builtin.zig_backend == .stage2_riscv64 or
+        builtin.zig_backend == .stage2_sparcv9 or
         (builtin.zig_backend == .stage2_llvm and native_os != .linux) or
         (builtin.zig_backend == .stage2_llvm and native_arch != .x86_64))
     {
diff --git a/src/Compilation.zig b/src/Compilation.zig
index 338be582d8ad91ba11db16bd6a6f46b755544dfd..6c486de36a8824c5738864e1c8fbf29b4cceb69f 100644
--- a/src/Compilation.zig
+++ b/src/Compilation.zig
@@ -4531,6 +4531,7 @@ pub fn generateBuiltinZigSource(comp: *Compilation, allocator: Allocator) Alloca
             .i386 => .stage2_x86,
             .aarch64, .aarch64_be, .aarch64_32 => .stage2_aarch64,
             .riscv64 => .stage2_riscv64,
+            .sparcv9 => .stage2_sparcv9,
             else => .other,
         };
     };