diff --git a/libraries/metrics/uv_threadpool_size.coffee b/libraries/metrics/uv_threadpool_size.coffee
index c0947fee31..36b7466248 100644
--- a/libraries/metrics/uv_threadpool_size.coffee
+++ b/libraries/metrics/uv_threadpool_size.coffee
@@ -1,2 +1,3 @@
-process.env.UV_THREADPOOL_SIZE=16
-console.log "Set UV_THREADPOOL_SIZE=#{process.env.UV_THREADPOOL_SIZE}"
+unless process.env.UV_THREADPOOL_SIZE
+	process.env.UV_THREADPOOL_SIZE=16
+	console.log "Set UV_THREADPOOL_SIZE=#{process.env.UV_THREADPOOL_SIZE}"