diff --git a/services/audio_service/client/src/fast_audio_stream.cpp b/services/audio_service/client/src/fast_audio_stream.cpp
index 24df2b7fb1f4d4d7cf77457cf6c8ca01012fb115..7e30e0d7b34765802db15d31994baabdb9c7730c 100644
--- a/services/audio_service/client/src/fast_audio_stream.cpp
+++ b/services/audio_service/client/src/fast_audio_stream.cpp
@@ -370,6 +370,7 @@ int32_t FastAudioStream::SetMute(bool mute, StateChangeCmdType cmdType)
 
 bool FastAudioStream::GetMute()
 {
+    CHECK_AND_RETURN_RET_LOG(processClient_ != nullptr, false, "GetMute failed: null process");
     return processClient_->GetMute();
 }
 
@@ -391,6 +392,7 @@ int32_t FastAudioStream::SetDuckVolume(float volume)
 
 float FastAudioStream::GetDuckVolume()
 {
+    CHECK_AND_RETURN_RET_LOG(processClient_ != nullptr, 1.0f, "GetDuckVolume failed: null process"); // 1.0f for default
     return processClient_->GetDuckVolume();
 }