diff --git a/src/brevitas/backport/__init__.py b/src/brevitas/backport/__init__.py
index 00102698a..57912f0e2 100644
--- a/src/brevitas/backport/__init__.py
+++ b/src/brevitas/backport/__init__.py
@@ -251,3 +251,4 @@ def sym_min(a, b):
 
 # Populate magic methods on SymInt and SymFloat
 import brevitas.backport.fx.experimental.symbolic_shapes
+import brevitas.backport.fx
diff --git a/src/brevitas/backport/fx/experimental/proxy_tensor.py b/src/brevitas/backport/fx/experimental/proxy_tensor.py
index f920e9f8e..430623e9d 100644
--- a/src/brevitas/backport/fx/experimental/proxy_tensor.py
+++ b/src/brevitas/backport/fx/experimental/proxy_tensor.py
@@ -62,13 +62,14 @@
 from torch.utils._python_dispatch import TorchDispatchMode
 import torch.utils._pytree as pytree
 
+from brevitas import backport
+from brevitas.backport import fx
 from brevitas.backport import SymBool
 from brevitas.backport import SymFloat
 from brevitas.backport import SymInt
 from brevitas.backport.fx import GraphModule
 from brevitas.backport.fx import Proxy
 from brevitas.backport.fx import Tracer
-import brevitas.backport.fx as fx
 from brevitas.backport.fx.passes.shape_prop import _extract_tensor_metadata
 from brevitas.backport.utils._stats import count
 from brevitas.backport.utils.weak import WeakTensorKeyDictionary
@@ -316,7 +317,7 @@ def proxy_call(proxy_mode, func, args, kwargs):
     # `__torch_dispatch__` is only called on torch ops, which must subclass `OpOverload`
     # We treat all other functions as an `external_call`, for instance, a function decorated
     # with `@torch.fx.wrap`
-    external_call = not isinstance(func, fx.backport._ops.OpOverload)
+    external_call = not isinstance(func, backport._ops.OpOverload)
 
     def can_handle_tensor(x):
         return type(x) in HANDLED_TYPES or has_proxy_slot(x, proxy_mode.tracer)