diff --git a/openpnm/models/geometry/pore_seed.py b/openpnm/models/geometry/pore_seed.py
index <HASH>..<HASH> 100644
--- a/openpnm/models/geometry/pore_seed.py
+++ b/openpnm/models/geometry/pore_seed.py
@@ -10,6 +10,7 @@ sizes.
 """
 import numpy as _np
 import scipy as _sp
+from scipy import special
 from openpnm.models import misc as _misc
 from openpnm.utils import logging as _logging
 _logger = _logging.getLogger(__name__)
from scipy import special is added, otherwise gives attribute error for sp.special [ci skip]