diff --git a/bench/async_bench.cpp b/bench/async_bench.cpp
index 0686f414..64606414 100644
--- a/bench/async_bench.cpp
+++ b/bench/async_bench.cpp
@@ -44,7 +44,7 @@ int main(int argc, char *argv[])
 {
 
     int howmany = 1000000;
-    int queue_size = std::min(howmany + 2, 32768);
+    int queue_size = std::min(howmany + 2, 8192);
     int threads = 10;
     int iters = 3;