diff --git a/src/cpp11_thread.cpp b/src/cpp11_thread.cpp
index 071c013a1..914ee1728 100644
--- a/src/cpp11_thread.cpp
+++ b/src/cpp11_thread.cpp
@@ -122,7 +122,7 @@ thread_reset_event(event_t *handle)
     std::lock_guard<std::mutex> lock(event->mutex);
 
     event->state = false;
-    // event->cond.notify_all();
+    event->cond.notify_all();
 }
 
 void