diff --git a/imperative/python/megengine/functional/tensor_cache.py b/imperative/python/megengine/functional/_tensor_cache.py
similarity index 100%
rename from imperative/python/megengine/functional/tensor_cache.py
rename to imperative/python/megengine/functional/_tensor_cache.py
diff --git a/imperative/python/megengine/functional/elemwise.py b/imperative/python/megengine/functional/elemwise.py
index e92cb2d9..ca37850f 100644
--- a/imperative/python/megengine/functional/elemwise.py
+++ b/imperative/python/megengine/functional/elemwise.py
@@ -9,7 +9,7 @@ from ..core.tensor.array_method import _elwise
 from ..core.tensor.utils import convert_inputs
 from ..tensor import Tensor
 from ..utils.deprecation import deprecated_func
-from .tensor_cache import get_scalar_one
+from ._tensor_cache import get_scalar_one
 
 __all__ = [
     "abs",