diff --git a/src/addon.cpp b/src/addon.cpp
index d158b25f..8b650ca6 100644
--- a/src/addon.cpp
+++ b/src/addon.cpp
@@ -6,4 +6,5 @@ void init_all(v8::Local<v8::Object> target) {
     CardReader::init(target);
 }
 
-NODE_MODULE(pcsclite, init_all)
+NODE_MODULE(pcsclite, init_all);
+NAN_MODULE_WORKER_ENABLED(pcsclite, init_all);