diff --git a/src/arch/sparc64/CodeGen.zig b/src/arch/sparc64/CodeGen.zig
index f10baf0f85..ff27ca003d 100644
--- a/src/arch/sparc64/CodeGen.zig
+++ b/src/arch/sparc64/CodeGen.zig
@@ -537,7 +537,7 @@ fn genBody(self: *Self, body: []const Air.Inst.Index) InnerError!void {
             .xor             => @panic("TODO try self.airXor(inst)"),
             .shr, .shr_exact => @panic("TODO try self.airShr(inst)"),
 
-            .alloc           => @panic("TODO try self.airAlloc(inst)"),
+            .alloc           => try self.airAlloc(inst),
             .ret_ptr         => try self.airRetPtr(inst),
             .arg             => try self.airArg(inst),
             .assembly        => try self.airAsm(inst),
@@ -671,6 +671,11 @@ fn genBody(self: *Self, body: []const Air.Inst.Index) InnerError!void {
     }
 }
 
+fn airAlloc(self: *Self, inst: Air.Inst.Index) !void {
+    const stack_offset = try self.allocMemPtr(inst);
+    return self.finishAir(inst, .{ .ptr_stack_offset = stack_offset }, .{ .none, .none, .none });
+}
+
 fn airAsm(self: *Self, inst: Air.Inst.Index) !void {
     const ty_pl = self.air.instructions.items(.data)[inst].ty_pl;
     const extra = self.air.extraData(Air.Asm, ty_pl.payload);