diff --git a/ffi/py/tests/mobilenet_onnx_test.py b/ffi/py/tests/mobilenet_onnx_test.py
index 167a5a00b8..6b0265fc13 100644
--- a/ffi/py/tests/mobilenet_onnx_test.py
+++ b/ffi/py/tests/mobilenet_onnx_test.py
@@ -123,6 +123,7 @@ def test_typed_model_to_nnef_and_back():
         assert str(reloaded.output_fact(0)) == "B,1000,F32"
 
         path = tmpdirname / "nnef.tar.gz"
+        nnef = nnef.with_extended_identifier_syntax()
         nnef.write_model_to_tar_gz(typed, path)
         reloaded = nnef.model_for_path(path)
         assert str(reloaded.input_fact(0)) == "B,3,224,224,F32"
diff --git a/ffi/py/tract/nnef.py b/ffi/py/tract/nnef.py
index 98676352f8..030b05345b 100644
--- a/ffi/py/tract/nnef.py
+++ b/ffi/py/tract/nnef.py
@@ -72,6 +72,14 @@ def with_pulse(self) -> "Nnef":
         check(lib.tract_nnef_enable_pulse(self.ptr))
         return self
 
+    def with_extended_identifier_syntax(self) -> "Nnef":
+        """
+        Enable tract-opl extensions to NNEF for extended identifiers (will support PyTorch 2 path-like ids)
+        """
+        self._valid()
+        check(lib.tract_nnef_allow_extended_identifier_syntax(self.ptr, True))
+        return self
+
     def write_model_to_dir(self, model: Model, path: Union[str, Path]) -> None:
         """
         Save `model` as a NNEF directory model in `path`.
diff --git a/ffi/src/lib.rs b/ffi/src/lib.rs
index a1b5a7ef9c..5d00ad7b9d 100644
--- a/ffi/src/lib.rs
+++ b/ffi/src/lib.rs
@@ -232,6 +232,15 @@ pub unsafe extern "C" fn tract_nnef_enable_pulse(nnef: *mut TractNnef) -> TRACT_
     })
 }
 
+#[no_mangle]
+pub unsafe extern "C" fn tract_nnef_allow_extended_identifier_syntax(nnef: *mut TractNnef, enable: bool) -> TRACT_RESULT {
+    wrap(|| unsafe {
+        check_not_null!(nnef);
+        (*nnef).0.allow_extended_identifier_syntax(enable);
+        Ok(())
+    })
+}
+
 /// Destroy the NNEF parser. It is safe to detroy the NNEF parser once the model had been loaded.
 #[no_mangle]
 pub unsafe extern "C" fn tract_nnef_destroy(nnef: *mut *mut TractNnef) -> TRACT_RESULT {