diff --git a/utils/event_manager/src/netstack_event_manager.cpp b/utils/event_manager/src/netstack_event_manager.cpp
index 7ba30f780250b5a4ca963985ae20d9add701336c..8ded3b8180e477e9162b7389e13df63e91af14fe 100644
--- a/utils/event_manager/src/netstack_event_manager.cpp
+++ b/utils/event_manager/src/netstack_event_manager.cpp
@@ -28,6 +28,7 @@ void EventManager::AddListener(napi_env env,
                                bool once,
                                bool asyncCallback)
 {
+    std::lock_guard<std::mutex> lock(mutex_);
     auto it = std::remove_if(listeners_.begin(), listeners_.end(),
                              [type](const EventListener &listener) -> bool { return listener.MatchType(type); });
     listeners_.erase(it, listeners_.end());