diff --git a/pymatgen/symmetry/analyzer.py b/pymatgen/symmetry/analyzer.py
index e3cdf8634ed..64b80289205 100644
--- a/pymatgen/symmetry/analyzer.py
+++ b/pymatgen/symmetry/analyzer.py
@@ -217,6 +217,8 @@ def _get_symmetry(self):
             vectors in scaled positions.
         """
         d = spglib.get_symmetry(self._cell, symprec=self._symprec, angle_tolerance=self._angle_tol)
+        if d is None:
+            return (), ()
         # Sometimes spglib returns small translation vectors, e.g.
         # [1e-4, 2e-4, 1e-4]
         # (these are in fractional coordinates, so should be small denominator