diff --git a/src/py/mat3ra/made/tools/build/perturbation/builders.py b/src/py/mat3ra/made/tools/build/perturbation/builders.py
index 53db19b8..a9dee5a5 100644
--- a/src/py/mat3ra/made/tools/build/perturbation/builders.py
+++ b/src/py/mat3ra/made/tools/build/perturbation/builders.py
@@ -33,7 +33,7 @@ def _post_process(
         return [wrap_to_unit_cell(item) for item in items]
 
     def _update_material_name(self, material: Material, configuration: _ConfigurationType) -> Material:
-        perturbation_details = f"Perturbation: {configuration.perturbation_function_holder.get_json().get('function')}"
+        perturbation_details = f"Perturbation: {configuration.perturbation_function_holder.get_json().get('type')}"
         material.name = f"{material.name} ({perturbation_details})"
         return material
 
diff --git a/src/py/mat3ra/made/tools/utils/perturbation.py b/src/py/mat3ra/made/tools/utils/perturbation.py
index c06a0bb3..e66f4eed 100644
--- a/src/py/mat3ra/made/tools/utils/perturbation.py
+++ b/src/py/mat3ra/made/tools/utils/perturbation.py
@@ -129,7 +129,7 @@ def __init__(
     def get_json(self) -> dict:
         return {
             "type": self.__class__.__name__,
-            "function": "sine_wave",
+            "function": str(self.function),
             "variables": self.variables,
             "amplitude": self.amplitude,
             "wavelength": self.wavelength,