diff --git a/perf/bench/corosio/accept_churn_bench.cpp b/perf/bench/corosio/accept_churn_bench.cpp
index 8cb17528..4e7bdc6f 100644
--- a/perf/bench/corosio/accept_churn_bench.cpp
+++ b/perf/bench/corosio/accept_churn_bench.cpp
@@ -127,6 +127,8 @@ bench::benchmark_result bench_sequential_churn(
     perf::print_latency_stats( latency_stats, "Cycle latency" );
     std::cout << "\n";
 
+    acc.close();
+
     return bench::benchmark_result( "sequential" )
         .add( "cycles", static_cast<double>( cycles ) )
         .add( "elapsed_s", elapsed )
@@ -249,6 +251,9 @@ bench::benchmark_result bench_concurrent_churn(
     std::cout << "    Avg p99 latency: "
               << perf::format_latency( total_p99 / num_loops ) << "\n\n";
 
+    for( auto& a : acceptors )
+        a.close();
+
     return bench::benchmark_result( "concurrent_" + std::to_string( num_loops ) )
         .add( "num_loops", num_loops )
         .add( "total_cycles", static_cast<double>( total_cycles ) )
@@ -351,6 +356,8 @@ bench::benchmark_result bench_burst_churn(
     perf::print_latency_stats( burst_stats, "Burst latency" );
     std::cout << "\n";
 
+    acc.close();
+
     return bench::benchmark_result( "burst_" + std::to_string( burst_size ) )
         .add( "burst_size", burst_size )
         .add( "total_accepted", static_cast<double>( total_accepted ) )