diff --git a/2021/src/bin/day18.rs b/2021/src/bin/day18.rs
index 5559f06..d28747c 100644
--- a/2021/src/bin/day18.rs
+++ b/2021/src/bin/day18.rs
@@ -1,4 +1,3 @@
-#![feature(result_option_inspect)]
 #![feature(box_syntax)]
 #![feature(test)]
 extern crate test;