diff --git a/webrtc/modules/audio_processing/audio_processing_impl.cc b/webrtc/modules/audio_processing/audio_processing_impl.cc
index fd2316caa3..4254551d69 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.cc
+++ b/webrtc/modules/audio_processing/audio_processing_impl.cc
@@ -98,6 +98,7 @@ AudioProcessingImpl::AudioProcessingImpl(const Config& config)
       num_reverse_channels_(1),
       num_input_channels_(1),
       num_output_channels_(1),
+      output_will_be_muted_(false),
       key_pressed_(false) {
   echo_cancellation_ = EchoCancellationImplWrapper::Create(this);
   component_list_.push_back(echo_cancellation_);