diff --git a/src/twopass.rs b/src/twopass.rs
index 5a6cc04..e5df432 100644
--- a/src/twopass.rs
+++ b/src/twopass.rs
@@ -137,7 +137,11 @@ fn lookup(scope: &BuildContext<'_>, loc: &ast::Location) -> Location {
 				index: Box::new(Expression::Constant(ast::Constant::String(name.clone()))),
 			}
 		}
-		ast::Location::Field { table, index } => todo!(),
+		ast::Location::Field { table, index } => {
+			let table = Box::new(lookup(scope, &table));
+			let index = Box::new(build_expression(scope, &index));
+			Location::Field { table, index }
+		}
 	}
 }