diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index adb01d4a5e..0940335edf 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -3539,7 +3539,9 @@ static int decode_slice(struct AVCodecContext *avctx, void *arg){
 
                         return 0;
                     }else{
-                        ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
+                        ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y,
+                                        s->mb_x - 1, s->mb_y,
+                                        (AC_END|DC_END|MV_END)&part_mask);
 
                         return -1;
                     }