diff --git a/src/libstore/s3-binary-cache-store.cc b/src/libstore/s3-binary-cache-store.cc
index 37da44da8..96673a5b0 100644
--- a/src/libstore/s3-binary-cache-store.cc
+++ b/src/libstore/s3-binary-cache-store.cc
@@ -281,8 +281,8 @@ struct S3BinaryCacheStoreImpl : public S3BinaryCacheStore
 
         auto maxThreads = std::thread::hardware_concurrency();
 
-        auto executor =
-            std::make_shared<Aws::Utils::Threading::PooledThreadExecutor>(maxThreads);
+        static std::shared_ptr<Aws::Utils::Threading::PooledThreadExecutor>
+            executor = std::make_shared<Aws::Utils::Threading::PooledThreadExecutor>(maxThreads);
 
         TransferManagerConfiguration transferConfig(executor.get());