diff --git a/src/ifcgeom/IfcGeomRenderStyles.cpp b/src/ifcgeom/IfcGeomRenderStyles.cpp
index 4d912a83d2..edc2085b79 100644
--- a/src/ifcgeom/IfcGeomRenderStyles.cpp
+++ b/src/ifcgeom/IfcGeomRenderStyles.cpp
@@ -135,6 +135,6 @@ const IfcGeom::SurfaceStyle* IfcGeom::Kernel::get_style(const IfcSchema::IfcMate
 			}
 		}
 	}
-	IfcGeom::SurfaceStyle material_style = IfcGeom::SurfaceStyle(material->id(), material->Name());
-	return &(style_cache[material->id()] = material_style);
+	IfcGeom::SurfaceStyle material_style = IfcGeom::SurfaceStyle(material->data().id(), material->Name());
+	return &(style_cache[material->data().id()] = material_style);
 }