diff --git a/modules/audio_coding/acm2/acm_receiver.cc b/modules/audio_coding/acm2/acm_receiver.cc
index 41a23a7..84efc5c 100644
--- a/modules/audio_coding/acm2/acm_receiver.cc
+++ b/modules/audio_coding/acm2/acm_receiver.cc
@@ -40,7 +40,8 @@
       clock_(config.clock),
       resampled_last_output_frame_(true) {
   RTC_DCHECK(clock_);
-  memset(last_audio_buffer_.get(), 0, AudioFrame::kMaxDataSizeSamples);
+  memset(last_audio_buffer_.get(), 0,
+         sizeof(int16_t) * AudioFrame::kMaxDataSizeSamples);
 }
 
 AcmReceiver::~AcmReceiver() = default;