1 files changed, 2 insertions, 2 deletions

diff --git a/src/lisp/eval.rs b/src/lisp/eval.rs
index c5e4ed0..1b277f9 100644
--- a/src/lisp/eval.rs
+++ b/src/lisp/eval.rs
@@ -336,9 +336,9 @@ pub fn lookup(env_list: &[Environment], key: &str) -> Result<LispExpr, LispError
         .ok_or(EvalError::UnboundVariable(key.into()))?)
 }
 
-pub fn lookup_mut<'a, 'b>(
+pub fn lookup_mut<'a>(
     env_list: &'a mut [Environment],
-    key: &'b str,
+    key: &'_ str,
 ) -> Result<&'a mut LispExpr, LispError> {
     Ok(env_list
         .iter_mut()