diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index c360051..43dd53c 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -6651,7 +6651,7 @@
     if (mResampler != NULL) {
         mBufFrameSize = max(mSrcChannelCount, FCC_2)
                 * audio_bytes_per_sample(AUDIO_FORMAT_PCM_FLOAT);
-    } else if ((mIsLegacyUpmix || mIsLegacyDownmix) && mDstFormat != AUDIO_FORMAT_PCM_FLOAT) {
+    } else if (mIsLegacyUpmix || mIsLegacyDownmix) { // legacy modes always float
         mBufFrameSize = mDstChannelCount * audio_bytes_per_sample(AUDIO_FORMAT_PCM_FLOAT);
     } else if (mSrcChannelMask != mDstChannelMask && mDstFormat != mSrcFormat) {
         mBufFrameSize = mDstChannelCount * audio_bytes_per_sample(mSrcFormat);