diff --git a/audio/aidl/default/Stream.cpp b/audio/aidl/default/Stream.cpp
index 6595324..e8c1693 100644
--- a/audio/aidl/default/Stream.cpp
+++ b/audio/aidl/default/Stream.cpp
@@ -848,7 +848,7 @@
 }
 
 StreamInHwGainHelper::StreamInHwGainHelper(const StreamContext* context)
-    : mChannelCount(getChannelCount(context->getChannelLayout())) {}
+    : mChannelCount(getChannelCount(context->getChannelLayout())), mHwGains(mChannelCount, 0.0f) {}
 
 ndk::ScopedAStatus StreamInHwGainHelper::getHwGainImpl(std::vector<float>* _aidl_return) {
     *_aidl_return = mHwGains;
@@ -979,7 +979,8 @@
 }
 
 StreamOutHwVolumeHelper::StreamOutHwVolumeHelper(const StreamContext* context)
-    : mChannelCount(getChannelCount(context->getChannelLayout())) {}
+    : mChannelCount(getChannelCount(context->getChannelLayout())),
+      mHwVolumes(mChannelCount, 0.0f) {}
 
 ndk::ScopedAStatus StreamOutHwVolumeHelper::getHwVolumeImpl(std::vector<float>* _aidl_return) {
     *_aidl_return = mHwVolumes;