diff --git a/src/win/async.c b/src/win/async.c
index 16a1e109..eade3f2f 100644
--- a/src/win/async.c
+++ b/src/win/async.c
@@ -69,12 +69,12 @@ int uv_async_send(uv_async_t* handle) {
 
 void uv_process_async_wakeup_req(uv_loop_t* loop,
                                  uv_req_t* req) {
-  assert(req->type == UV_WAKEUP);
-
   QUEUE queue;
   QUEUE* q;
   uv_async_t* h;
 
+  assert(req->type == UV_WAKEUP);
+
   QUEUE_MOVE(&loop->async_handles, &queue);
   while (!QUEUE_EMPTY(&queue)) {
     q = QUEUE_HEAD(&queue);