diff --git a/benchmarks/benches/utils.rs b/benchmarks/benches/utils.rs
index fd1df0a90..5318527f4 100644
--- a/benchmarks/benches/utils.rs
+++ b/benchmarks/benches/utils.rs
@@ -115,5 +115,7 @@ pub fn run_benches(c: &mut criterion::Criterion, confs: &[Conf]) {
             });
         }
         group.finish();
+
+        index.prepare_for_closing().wait();
     }
 }