diff --git a/mute-interpreter/src/evaluator.rs b/mute-interpreter/src/evaluator.rs
index d4fb240..70a6f69 100644
--- a/mute-interpreter/src/evaluator.rs
+++ b/mute-interpreter/src/evaluator.rs
@@ -79,12 +79,11 @@ pub fn eval_node(env: &Environment, ast_node: Node) -> Result<Node> {
                 }
 
                 Node::BuiltIn(built_in) => {
-                    let args = list;
-                    let args = args
+                    let args = list
                         .into_iter()
                         .map(|node| eval_node(env, node))
                         .collect::<Result<VecDeque<Node>>>()?;
-                    built_in::eval_built_in(&env, built_in, args)
+                    built_in::eval_built_in(env, built_in, args)
                 }
 
                 Node::Macro(mut body) => {