diff --git a/src/gallium/drivers/d3d12/d3d12_video_encoder_references_manager_hevc.cpp b/src/gallium/drivers/d3d12/d3d12_video_encoder_references_manager_hevc.cpp
index 33a5b020e93..c2adb3676c7 100644
--- a/src/gallium/drivers/d3d12/d3d12_video_encoder_references_manager_hevc.cpp
+++ b/src/gallium/drivers/d3d12/d3d12_video_encoder_references_manager_hevc.cpp
@@ -37,7 +37,7 @@ d3d12_video_encoder_references_manager_hevc::get_current_frame_picture_control_d
    assert((codecAllocation.DataSize == sizeof(D3D12_VIDEO_ENCODER_PICTURE_CONTROL_CODEC_DATA_HEVC)) ||
           (codecAllocation.DataSize == sizeof(D3D12_VIDEO_ENCODER_PICTURE_CONTROL_CODEC_DATA_HEVC1)));
    memcpy(codecAllocation.pHEVCPicData1, &m_curFrameState, codecAllocation.DataSize);
-   memset(codecAllocation.pHEVCPicData1 + codecAllocation.DataSize, 0, sizeof(m_curFrameState) - codecAllocation.DataSize);
+   memset((uint8_t *)(& codecAllocation.pHEVCPicData1) + codecAllocation.DataSize, 0, sizeof(m_curFrameState) - codecAllocation.DataSize);
    return true;
 }
 
@@ -254,7 +254,7 @@ d3d12_video_encoder_references_manager_hevc::begin_frame(D3D12_VIDEO_ENCODER_PIC
    assert((curFrameData.DataSize == sizeof(D3D12_VIDEO_ENCODER_PICTURE_CONTROL_CODEC_DATA_HEVC)) ||
           (curFrameData.DataSize == sizeof(D3D12_VIDEO_ENCODER_PICTURE_CONTROL_CODEC_DATA_HEVC1)));
    memcpy(&m_curFrameState, curFrameData.pHEVCPicData1, curFrameData.DataSize);
-   memset(&m_curFrameState + curFrameData.DataSize, 0, sizeof(m_curFrameState) - curFrameData.DataSize);
+   memset(((uint8_t*)(&m_curFrameState) + curFrameData.DataSize), 0, sizeof(m_curFrameState) - curFrameData.DataSize);
 
    m_isCurrentFrameUsedAsReference = bUsedAsReference;