diff --git a/xllm/compiler/tilelang/targets/ascend/kernel_family_builder.py b/xllm/compiler/tilelang/targets/ascend/kernel_family_builder.py
index ab5ac75b62..55426db5af 100644
--- a/xllm/compiler/tilelang/targets/ascend/kernel_family_builder.py
+++ b/xllm/compiler/tilelang/targets/ascend/kernel_family_builder.py
@@ -107,7 +107,7 @@ def _run_variant_worker(args: _VariantWorkerArgs) -> _VariantBuildResult:
     compile_cmd = [
         args.bisheng_executable,
         *args.bisheng_compile_flags,
-        f"-Dg_tilingKey=g_tilingKey__{compile_spec.variant_key}",
+        f"-Dg_tilingKey=g_tilingKey__{compile_spec.kernel_name}_{compile_spec.variant_key}",
         *[f"-I{d}" for d in args.include_dirs],
         str(plan.generated_source),
         "-c",