diff --git a/camera/provider/2.4/default/LegacyCameraProviderImpl_2_4.cpp b/camera/provider/2.4/default/LegacyCameraProviderImpl_2_4.cpp
index 4cff1b7..7c3b982 100644
--- a/camera/provider/2.4/default/LegacyCameraProviderImpl_2_4.cpp
+++ b/camera/provider/2.4/default/LegacyCameraProviderImpl_2_4.cpp
@@ -450,7 +450,9 @@
         const sp<ICameraProviderCallback>& callback) {
     Mutex::Autolock _l(mCbLock);
     mCallbacks = callback;
-
+    if (mCallbacks == nullptr) {
+        return Status::OK;
+    }
     // Add and report all presenting external cameras.
     for (auto const& statusPair : mCameraStatusMap) {
         int id = std::stoi(statusPair.first);