diff --git a/openmc/weight_windows.py b/openmc/weight_windows.py
index 1a54c1b9b..ca71a9f0f 100644
--- a/openmc/weight_windows.py
+++ b/openmc/weight_windows.py
@@ -585,7 +585,7 @@ def wwinp_to_wws(path):
                            mesh=mesh,
                            lower_ww_bounds=ww_lb.flatten(),
                            upper_bound_ratio=5.0,
-                           energy_bins=e_bounds,
+                           energy_bounds=e_bounds,
                            particle_type=particle)
         wws.append(ww)
 
diff --git a/tests/unit_tests/weightwindows/test_wwinp_reader.py b/tests/unit_tests/weightwindows/test_wwinp_reader.py
index b9de6b329..fdabfe18a 100644
--- a/tests/unit_tests/weightwindows/test_wwinp_reader.py
+++ b/tests/unit_tests/weightwindows/test_wwinp_reader.py
@@ -117,7 +117,7 @@ def test_wwinp_reader(wwinp_data):
         np.testing.assert_allclose(mesh.z_grid, ww.mesh.z_grid, rtol=1e-6)
 
         # check the energy bounds
-        np.testing.assert_array_equal(e_bounds, ww.energy_bins)
+        np.testing.assert_array_equal(e_bounds, ww.energy_bounds)
 
         # check the expected weight window values mocked in the file --
         # a reversed array of the flat index into the numpy array