diff --git a/openmc/summary.py b/openmc/summary.py
index eb14d3bb81..29c30c2936 100644
--- a/openmc/summary.py
+++ b/openmc/summary.py
@@ -368,7 +368,6 @@ class Summary(object):
                 lattice.universes = universes
 
                 if offsets is not None:
-                    offsets = np.swapaxes(offsets, 0, 2)
                     lattice.offsets = offsets
 
                 # Add the Lattice to the global dictionary of all Lattices
diff --git a/openmc/universe.py b/openmc/universe.py
index 237ddce1f7..319acc3302 100644
--- a/openmc/universe.py
+++ b/openmc/universe.py
@@ -1101,8 +1101,8 @@ class RectLattice(Lattice):
 
         # For 3D Lattices
         else:
-            offset = self._offsets[i[1]-1, i[2]-1, i[3]-1, distribcell_index-1]
-            offset += self._universes[i[1]-1][i[2]-1][i[3]-1].get_cell_instance(
+            offset = self._offsets[i[3]-1, i[2]-1, i[1]-1, distribcell_index-1]
+            offset += self._universes[i[3]-1][i[2]-1][i[1]-1].get_cell_instance(
                                                         path, distribcell_index)
 
         return offset