diff --git a/express/settings.py b/express/settings.py
index 550af34f..be222695 100644
--- a/express/settings.py
+++ b/express/settings.py
@@ -19,6 +19,7 @@
         "reference": "express.properties.scalar.thermal_correction_to_enthalpy.ThermalCorrectionToEnthalpy"
     },
     "surface_energy": {"reference": "express.properties.scalar.scalar_property_context.ScalarPropertyFromContext"},
+    "interfacial_energy": {"reference": "express.properties.scalar.scalar_property_context.ScalarPropertyFromContext"},
     "formation_energy": {"reference": "express.properties.scalar.scalar_property_context.ScalarPropertyFromContext"},
     "reaction_energy_barrier": {"reference": "express.properties.scalar.reaction_energy_barrier.ReactionEnergyBarrier"},
     "valence_band_offset": {"reference": "express.properties.scalar.scalar_property_context.ScalarPropertyFromContext"},