diff --git a/refl1d/errors.py b/refl1d/errors.py
index 1df20248..b7b8cd20 100644
--- a/refl1d/errors.py
+++ b/refl1d/errors.py
@@ -188,7 +188,7 @@ def record_point():
             slabs_i = [L.thickness.value for L in m.sample[1:-1]]
             slabs[m].append(np.array(slabs_i))
             if m.ismagnetic:
-                z, rho, irho, rhoM, thetaM = m.magnetic_step_profile()
+                z, rho, irho, rhoM, thetaM = m.magnetic_smooth_profile()
                 profiles[m].append((z+0, rho+0, irho+0, rhoM+0, thetaM+0))
             else:
                 z, rho, irho = m.smooth_profile()