diff --git a/src/lime/system/BackgroundWorker.hx b/src/lime/system/BackgroundWorker.hx
index f9d922e7c..5be17e9ea 100644
--- a/src/lime/system/BackgroundWorker.hx
+++ b/src/lime/system/BackgroundWorker.hx
@@ -1,3 +1,4 @@
 package lime.system;
 
+@:deprecated("Replace references to lime.system.BackgroundWorker with lime.system.ThreadPool. As the API is identical, no other changes are necessary.")
 typedef BackgroundWorker = ThreadPool;