diff --git a/layercake/basis/centered_planar_fourier.py b/layercake/basis/centered_planar_fourier.py
index 10cf03e..3f10dae 100644
--- a/layercake/basis/centered_planar_fourier.py
+++ b/layercake/basis/centered_planar_fourier.py
@@ -102,6 +102,7 @@ def set_parameters(self, parameters):
         else:
             raise ValueError("Parameter 'n' (model aspect ratio) should be present in the provided parameters")
 
+        self.parameters = parameters
         aspect_ratio = float(param)
 
         if self.length is None:
diff --git a/layercake/basis/planar_fourier.py b/layercake/basis/planar_fourier.py
index a010726..48c0fad 100644
--- a/layercake/basis/planar_fourier.py
+++ b/layercake/basis/planar_fourier.py
@@ -96,6 +96,7 @@ def set_parameters(self, parameters):
         else:
             raise ValueError("Parameter 'n' (model aspect ratio) should be present in the provided parameters")
 
+        self.parameters = parameters
         aspect_ratio = float(param)
 
         if self.length is None:
@@ -189,6 +190,7 @@ def set_parameters(self, parameters):
         else:
             raise ValueError("Parameter 'n' (model aspect ratio) should be present in the provided parameters")
 
+        self.parameters = parameters
         aspect_ratio = float(param)
 
         if self.length is None:
diff --git a/layercake/basis/spherical_harmonics.py b/layercake/basis/spherical_harmonics.py
index 513b4f8..54e39cb 100644
--- a/layercake/basis/spherical_harmonics.py
+++ b/layercake/basis/spherical_harmonics.py
@@ -145,6 +145,7 @@ def set_parameters(self, parameters):
         else:
             raise ValueError("Parameter 'R' (sphere radius) should be present in the provided parameters")
 
+        self.parameters = parameters
         radius = float(param)
         coordinate_system = SphericalCoordinateSystem(param)
         self.coordinate_system = coordinate_system