}
#if CONFIG_VP9_DXVA2_HWACCEL
-AVHWAccel ff_vp9_dxva2_hwaccel = {
+const AVHWAccel ff_vp9_dxva2_hwaccel = {
.name = "vp9_dxva2",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_VP9,
#endif
#if CONFIG_VP9_D3D11VA_HWACCEL
-AVHWAccel ff_vp9_d3d11va_hwaccel = {
+const AVHWAccel ff_vp9_d3d11va_hwaccel = {
.name = "vp9_d3d11va",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_VP9,
#endif
#if CONFIG_VP9_D3D11VA2_HWACCEL
-AVHWAccel ff_vp9_d3d11va2_hwaccel = {
+const AVHWAccel ff_vp9_d3d11va2_hwaccel = {
.name = "vp9_d3d11va2",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_VP9,