diff --git a/rust/tools/builtins/mentions.rs b/rust/tools/builtins/mentions.rs
index 3170c1bfbdf..11b3bda6a52 100644
--- a/rust/tools/builtins/mentions.rs
+++ b/rust/tools/builtins/mentions.rs
@@ -3,4 +3,4 @@
 use std::future::Future;
 fn mention_dyn_future<T>(f: &dyn Future<Output = T>) {}
 
-fn mention_dyn_fn_once<F>(f: &dyn Fn() -> F) {}
+fn mention_dyn_fn<F>(f: &dyn Fn() -> F) {}