diff --git a/src/rust/namegen-lambda/src/main.rs b/src/rust/namegen-lambda/src/main.rs
index 6612d94..0611b70 100644
--- a/src/rust/namegen-lambda/src/main.rs
+++ b/src/rust/namegen-lambda/src/main.rs
@@ -1,5 +1,3 @@
-#![feature(async_closure)]
-
 use std::collections::HashMap;
 use std::fs::File;
 use std::io::Read;