diff --git a/fiasco/levels.py b/fiasco/levels.py
index 5250f868..cd6acf20 100644
--- a/fiasco/levels.py
+++ b/fiasco/levels.py
@@ -100,10 +100,11 @@ def label(self):
         Label denoting level configuration, multiplicity, angular momentum label,
         and total angular momentum.
         """
-        zipped = zip(self.configuration,
-                     self.multiplicity,
-                     self.orbital_angular_momentum_label,
-                     self.total_angular_momentum)
+        zipped = zip(np.atleast_1d(self.configuration),
+                     np.atleast_1d(self.multiplicity),
+                     np.atleast_1d(self.orbital_angular_momentum_label),
+                     np.atleast_1d(self.total_angular_momentum),
+                     )
         return np.array([f"{i} {j}{k}{Fraction(l.value)}" for i,j,k,l in zipped])
 
     @property
diff --git a/fiasco/tests/test_ion.py b/fiasco/tests/test_ion.py
index 32ddb902..f585a687 100644
--- a/fiasco/tests/test_ion.py
+++ b/fiasco/tests/test_ion.py
@@ -100,6 +100,8 @@ def test_level(ion):
     assert level.orbital_angular_momentum_label == 'D'
     assert level.orbital_angular_momentum == 2
     assert level.is_observed
+    assert len(level.label) == 1
+    assert level.label[0] == '3d4 5D0'
 
 
 @pytest.mark.parametrize(('ion_name', 'n_levels'), [