diff --git a/benches/req_rep.rs b/benches/req_rep.rs
index 1bbaa11..6451d2b 100644
--- a/benches/req_rep.rs
+++ b/benches/req_rep.rs
@@ -40,7 +40,7 @@ fn criterion_benchmark(c: &mut Criterion) {
     bench(&mut group, "TCP", "tcp://localhost:0", &mut rt);
     bench(&mut group, "IPC", "ipc://req_rep.sock", &mut rt);
 
-    fn bench(group: &mut BenchGroup, bench_name: &str, endpoint: &str, rt: &mut Runtime) {
+    fn bench(group: &mut BenchGroup<'_>, bench_name: &str, endpoint: &str, rt: &mut Runtime) {
         #[allow(unused, clippy::redundant_locals)]
         let rt = rt;