1 files changed, 3 insertions, 0 deletions

diff --git a/src/lisp/prelude.rs b/src/lisp/prelude.rs
index 1d37a32..d6e1874 100644
--- a/src/lisp/prelude.rs
+++ b/src/lisp/prelude.rs
@@ -489,5 +489,8 @@ pub fn new_env() -> Result<Environment, LispError> {
         }
     });
 
+    primitive!(env, Arity::Exact(1), "id", |args, _| {
+        Ok(args[0].clone())
+    });
     Ok(env)
 }