diff --git a/audio/aidl/default/Stream.cpp b/audio/aidl/default/Stream.cpp
index de66293..3d7f30c 100644
--- a/audio/aidl/default/Stream.cpp
+++ b/audio/aidl/default/Stream.cpp
@@ -937,9 +937,12 @@
 }
 
 StreamInHwGainHelper::StreamInHwGainHelper(const StreamContext* context)
-    : mChannelCount(getChannelCount(context->getChannelLayout())), mHwGains(mChannelCount, 0.0f) {}
+    : mChannelCount(getChannelCount(context->getChannelLayout())) {}
 
 ndk::ScopedAStatus StreamInHwGainHelper::getHwGainImpl(std::vector<float>* _aidl_return) {
+    if (mHwGains.empty()) {
+        mHwGains.resize(mChannelCount, 0.0f);
+    }
     *_aidl_return = mHwGains;
     LOG(DEBUG) << __func__ << ": returning " << ::android::internal::ToString(*_aidl_return);
     return ndk::ScopedAStatus::ok();
@@ -1068,10 +1071,12 @@
 }
 
 StreamOutHwVolumeHelper::StreamOutHwVolumeHelper(const StreamContext* context)
-    : mChannelCount(getChannelCount(context->getChannelLayout())),
-      mHwVolumes(mChannelCount, 0.0f) {}
+    : mChannelCount(getChannelCount(context->getChannelLayout())) {}
 
 ndk::ScopedAStatus StreamOutHwVolumeHelper::getHwVolumeImpl(std::vector<float>* _aidl_return) {
+    if (mHwVolumes.empty()) {
+        mHwVolumes.resize(mChannelCount, 0.0f);
+    }
     *_aidl_return = mHwVolumes;
     LOG(DEBUG) << __func__ << ": returning " << ::android::internal::ToString(*_aidl_return);
     return ndk::ScopedAStatus::ok();