diff --git a/audio/core/all-versions/default/StreamOut.cpp b/audio/core/all-versions/default/StreamOut.cpp
index 1fb7267..357fd94 100644
--- a/audio/core/all-versions/default/StreamOut.cpp
+++ b/audio/core/all-versions/default/StreamOut.cpp
@@ -698,7 +698,7 @@
 // static
 int StreamOut::asyncEventCallback(stream_event_callback_type_t event, void* param, void* cookie) {
     StreamOut* self = reinterpret_cast<StreamOut*>(cookie);
-    sp<IStreamOutEventCallback> eventCallback = self->mEventCallback;
+    sp<IStreamOutEventCallback> eventCallback = self->mEventCallback.load();
     if (eventCallback.get() == nullptr) return 0;
     ALOGV("%s event %d", __func__, event);
     Return<void> result;
diff --git a/audio/core/all-versions/default/include/core/default/StreamOut.h b/audio/core/all-versions/default/include/core/default/StreamOut.h
index c246ef3..02d8e89 100644
--- a/audio/core/all-versions/default/include/core/default/StreamOut.h
+++ b/audio/core/all-versions/default/include/core/default/StreamOut.h
@@ -161,7 +161,7 @@
     const sp<StreamMmap<audio_stream_out_t>> mStreamMmap;
     mediautils::atomic_sp<IStreamOutCallback> mCallback;  // for non-blocking write and drain
 #if MAJOR_VERSION >= 6
-    sp<IStreamOutEventCallback> mEventCallback;
+    mediautils::atomic_sp<IStreamOutEventCallback> mEventCallback;
 #endif
     std::unique_ptr<CommandMQ> mCommandMQ;
     std::unique_ptr<DataMQ> mDataMQ;