diff --git a/openmc/geometry.py b/openmc/geometry.py
index f1c038403d..2ea9705fa4 100644
--- a/openmc/geometry.py
+++ b/openmc/geometry.py
@@ -205,7 +205,7 @@ class GeometryFile(object):
         sort_xml_elements(self._geometry_file)
         clean_xml_indentation(self._geometry_file)
 
-        # Write the XML Tree to the materials.xml file
+        # Write the XML Tree to the geometry.xml file
         tree = ET.ElementTree(self._geometry_file)
         tree.write("geometry.xml", xml_declaration=True,
                              encoding='utf-8', method="xml")
diff --git a/openmc/universe.py b/openmc/universe.py
index 62055049d7..6d9bbccb6b 100644
--- a/openmc/universe.py
+++ b/openmc/universe.py
@@ -1059,7 +1059,7 @@ class HexLattice(Lattice):
     @Lattice.pitch.setter
     def pitch(self, pitch):
         check_type('lattice pitch', pitch, Iterable, Real)
-        check_length('lattice pitch', pitch, 2, 3)
+        check_length('lattice pitch', pitch, 1, 2)
         for dim in pitch:
             check_greater_than('lattice pitch', dim, 0)
         self._pitch = pitch