diff --git a/src/ifcopenshell-python/ifcopenshell/alignment.py b/src/ifcopenshell-python/ifcopenshell/alignment.py
index 14c9c5e8d5..9b52da0d84 100644
--- a/src/ifcopenshell-python/ifcopenshell/alignment.py
+++ b/src/ifcopenshell-python/ifcopenshell/alignment.py
@@ -47,8 +47,9 @@ def evaluate_representation(shape_rep: entity_instance, dist_along: float) -> np
 
     s = ifcopenshell.geom.settings()
     piecewise_function = ifcopenshell_wrapper.map_shape(s, shape_rep.wrapped_data)
+    pwf_evaluator = ifcopenshell_wrapper.piecewise_function_evaluator(piecewise_function,s)
 
-    trans_matrix = piecewise_function.evaluate(dist_along)
+    trans_matrix = pwf_evaluator.evaluate(dist_along)
 
     return np.array(trans_matrix, dtype=np.float64).T
 
@@ -68,8 +69,9 @@ def evaluate_segment(segment: entity_instance, dist_along: float) -> np.ndarray:
 
     s = ifcopenshell.geom.settings()
     piecewise_function = ifcopenshell_wrapper.map_shape(s, segment.wrapped_data)
+    pwf_evaluator = ifcopenshell_wrapper.piecewise_function_evaluator(piecewise_function,s)
 
-    trans_matrix = piecewise_function.evaluate(dist_along)
+    trans_matrix = pwf_evaluator.evaluate(dist_along)
 
     return np.array(trans_matrix, dtype=np.float64).T