diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c
index bfebc3806c..d89adf8d63 100644
--- a/libavcodec/mpeg4videodec.c
+++ b/libavcodec/mpeg4videodec.c
@@ -3534,6 +3534,7 @@ static int mpeg4_update_thread_context(AVCodecContext *dst,
     s->vol_sprite_usage          = s1->vol_sprite_usage;
     s->sprite_brightness_change  = s1->sprite_brightness_change;
     s->num_sprite_warping_points = s1->num_sprite_warping_points;
+    s->m.data_partitioning       = s1->m.data_partitioning;
     s->rvlc                      = s1->rvlc;
     s->resync_marker             = s1->resync_marker;
     s->t_frame                   = s1->t_frame;