hwaccel: unbreak build

Signed-off-by: Mans Rullgard <mans@mansr.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/libavcodec/vaapi_mpeg4.c b/libavcodec/vaapi_mpeg4.c
index fcd429086e..1a756cbaf4 100644
--- a/libavcodec/vaapi_mpeg4.c
+++ b/libavcodec/vaapi_mpeg4.c
@@ -79,7 +79,7 @@ static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_
     pic_param->quant_precision                          = s->quant_precision;
     pic_param->vop_fields.value                         = 0; /* reset all bits */
     pic_param->vop_fields.bits.vop_coding_type          = s->pict_type - AV_PICTURE_TYPE_I;
-    pic_param->vop_fields.bits.backward_reference_vop_coding_type = s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.pict_type - AV_PICTURE_TYPE_I : 0;
+    pic_param->vop_fields.bits.backward_reference_vop_coding_type = s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f.pict_type - AV_PICTURE_TYPE_I : 0;
     pic_param->vop_fields.bits.vop_rounding_type        = s->no_rounding;
     pic_param->vop_fields.bits.intra_dc_vlc_thr         = mpeg4_get_intra_dc_vlc_thr(s);
     pic_param->vop_fields.bits.top_field_first          = s->top_field_first;