diff --git a/imperative/python/megengine/traced_module/compat.py b/imperative/python/megengine/traced_module/compat.py
index 1cbf87d842f5a0464d4cd3d1a851ea2b7e6a0e77..3941b470ce59353a1ff49baa05614d72ae8bc24c 100644
--- a/imperative/python/megengine/traced_module/compat.py
+++ b/imperative/python/megengine/traced_module/compat.py
@@ -99,11 +99,10 @@ def add_loader(expr):
     ("megengine.module.batchnorm", "SyncBatchNorm"),
 )
 def bn2d_module_loader(expr):
-    # mge 1.6
-    if not hasattr(expr, "version"):
-        module = expr.inputs[0].owner
-        if not hasattr(module, "param_dim"):
-            module.param_dim = "dim_1c11"
+    module = expr.inputs[0].owner
+    if hasattr(module, "param_dim"):
+        assert module.param_dim == "dim_1c11"
+        delattr(module, "param_dim")
 
 
 @register_module_loader(
@@ -113,12 +112,10 @@ def bn2d_module_loader(expr):
     ("megengine.module.qat.conv_bn", "ConvBnRelu2d"),
 )
 def convbn2d_module_loader(expr):
-    # mge 1.6
-    if not hasattr(expr, "version"):
-        module = expr.inputs[0].owner
-        if not hasattr(module.bn, "param_dim"):
-            module.bn.param_dim = "dim_1c11"
     module = expr.inputs[0].owner
+    if hasattr(module.bn, "param_dim"):
+        assert module.bn.param_dim == "dim_1c11"
+        delattr(module.bn, "param_dim")
     if not hasattr(module.conv, "padding_mode"):
         module.conv.padding_mode = "zeros"
 
@@ -167,6 +164,26 @@ def pad_func_loader(expr):
         expr.set_args_kwargs(*expr.args, **kwargs)
 
 
+@register_functional_loader(("megengine.functional.nn", "batch_norm"))
+def bn_func_loader(expr):
+    kwargs = expr.kwargs
+    if "compute_mode" in kwargs:
+        assert kwargs["compute_mode"] == "default"
+        kwargs.pop("compute_mode")
+    if "param_dim" in kwargs:
+        assert kwargs["param_dim"] == "dim_1c11"
+        kwargs.pop("param_dim")
+    expr.set_args_kwargs(*expr.args, **kwargs)
+
+
+@register_functional_loader(("megengine.functional.math", "matmul"))
+def matmul_func_loader(expr):
+    args = expr.args
+    if len(args) == 6:
+        assert args[5] == "default"
+        expr.set_args_kwargs(*args[0:5])
+
+
 @register_module_loader(
     ("megengine.module.conv", "Conv1d"),
     ("megengine.module.conv", "Conv2d"),
diff --git a/imperative/python/megengine/utils/deprecation.py b/imperative/python/megengine/utils/deprecation.py
index ea58d71aaf2f016c82f3f1f604a764ada405c0e8..f9ed8bdf5660969acecf5285c7cf50949f4dd736 100644
--- a/imperative/python/megengine/utils/deprecation.py
+++ b/imperative/python/megengine/utils/deprecation.py
@@ -17,11 +17,12 @@ def deprecated_func(version, origin, name, tbd):
         tbd: to be discussed, if true, ignore warnings
     """
     should_warning = not tbd
+    module = importlib.import_module(origin)
+    func = module.__getattribute__(name)
 
+    @wraps(func)
     def wrapper(*args, **kwargs):
         nonlocal should_warning
-        module = importlib.import_module(origin)
-        func = module.__getattribute__(name)
         if should_warning:
             warnings.warn(
                 "Call to deprecated function {}. (use {}.{} instead) -- Deprecated since version {}.".format(