diff --git a/audio/voip/voip_core.cc b/audio/voip/voip_core.cc
index 30868946fd..8df1c594aa 100644
--- a/audio/voip/voip_core.cc
+++ b/audio/voip/voip_core.cc
@@ -61,7 +61,7 @@ bool VoipCore::InitializeIfNeeded() {
   // introduced in the future.
   MutexLock lock(&lock_);
 
-  if (audio_device_module_->Initialized()) {
+  if (initialized_) {
     return true;
   }
 
@@ -116,6 +116,8 @@ bool VoipCore::InitializeIfNeeded() {
     RTC_LOG(LS_WARNING) << "Unable to register audio callback.";
   }
 
+  initialized_ = true;
+
   return true;
 }
 
diff --git a/audio/voip/voip_core.h b/audio/voip/voip_core.h
index 6df7d4edb0..6c3aec6fa2 100644
--- a/audio/voip/voip_core.h
+++ b/audio/voip/voip_core.h
@@ -164,6 +164,9 @@ class VoipCore : public VoipEngine,
   // ChannelId.
   std::unordered_map<ChannelId, rtc::scoped_refptr<AudioChannel>> channels_
       RTC_GUARDED_BY(lock_);
+
+  // Boolean flag to ensure initialization only occurs once.
+  bool initialized_ RTC_GUARDED_BY(lock_) = false;
 };
 
 }  // namespace webrtc