diff --git a/05_threadpool/modulename.cpp b/05_threadpool/modulename.cpp
index c76761f..cf49c1f 100644
--- a/05_threadpool/modulename.cpp
+++ b/05_threadpool/modulename.cpp
@@ -54,7 +54,8 @@ Handle<Value> Async(const Arguments& args) {
     // Schedule our work request with libuv. Here you can specify the functions
     // that should be executed in the threadpool and back in the main thread
     // after the threadpool function completed.
-    int status = uv_queue_work(uv_default_loop(), req, AsyncWork, AsyncAfter);
+    int status = uv_queue_work(uv_default_loop(), req, AsyncWork,
+                               (uv_after_work_cb)AsyncAfter);
     assert(status == 0);
 
     return Undefined();
diff --git a/xx_benchmark/modulename.cpp b/xx_benchmark/modulename.cpp
index 7b2bb95..253344c 100644
--- a/xx_benchmark/modulename.cpp
+++ b/xx_benchmark/modulename.cpp
@@ -56,7 +56,8 @@ Handle<Value> Fn3(const Arguments& args) {
     baton->request.data = baton;
     Local<Function> callback = Local<Function>::Cast(args[0]);
     baton->callback = Persistent<Function>::New(callback);
-    uv_queue_work(uv_default_loop(), &baton->request, Fn3Work, Fn3After);
+    uv_queue_work(uv_default_loop(), &baton->request, Fn3Work,
+                  (uv_after_work_cb)Fn3After);
     return Undefined();
 }