diff --git a/mne/transforms.py b/mne/transforms.py
index c85c319..db15d72 100644
--- a/mne/transforms.py
+++ b/mne/transforms.py
@@ -12,7 +12,7 @@ from pathlib import Path
 import numpy as np
 from scipy import linalg
 from scipy.spatial.distance import cdist
-from scipy.special import sph_harm
+from scipy.special import sph_harm_y
 
 from ._fiff.constants import FIFF
 from ._fiff.open import fiff_open