diff --git a/lca_carbon_workflow.py b/lca_carbon_workflow.py
index ae0a82b..b2b28ee 100644
--- a/lca_carbon_workflow.py
+++ b/lca_carbon_workflow.py
@@ -123,7 +123,7 @@ class LCACarbonWorkflow:
     for layer in boundary.layers:
       if not layer.no_mass:
         layer_material = \
-         self.nrcan_catalogs.search_materials(layer.material_name)
+         self.nrcan_catalogs.material_embodied(layer.material_name)
         layer_emission.append(EnvelopeEmission(
           layer_material['embodied_carbon'],
           boundary.opaque_area,