diff --git a/src/twopass.rs b/src/twopass.rs
index e5682ad..ce3aeb6 100644
--- a/src/twopass.rs
+++ b/src/twopass.rs
@@ -49,7 +49,7 @@ enum Expression {
 
 #[derive(Debug, Clone)]
 struct Call {
-	callee: Location,
+	callee: Box<Expression>,
 	args: Vec<Expression>,
 }