diff --git a/libavcodec/utvideoenc.c b/libavcodec/utvideoenc.c
index f650c4f..a16c144 100644
--- a/libavcodec/utvideoenc.c
+++ b/libavcodec/utvideoenc.c
@@ -623,19 +623,18 @@ static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     int i, ret = 0;

     /* Allocate a new packet if needed, and set it to the pointer dst */
-    if (!pkt->data)
-        ret = av_new_packet(pkt, (256 + 4 * c->slices +
-                            width * height) * c->planes + 4);
+    ret = ff_alloc_packet(pkt, (256 + 4 * c->slices + width * height) *
+                          c->planes + 4);

-    if (ret) {
-        av_log(avctx, AV_LOG_ERROR, "Error allocating output packet.\n");
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Error allocating or using the output packet.\n");
         return ret;
     }

     dst = pkt->data;

-    bytestream2_init_writer(&pb, dst, (256 + 4 * c->slices +
-                            width * height) * c->planes + 4);
+    bytestream2_init_writer(&pb, dst, pkt->size);

     av_fast_malloc(&c->slice_bits, &c->slice_bits_size,
                    width * height + FF_INPUT_BUFFER_PADDING_SIZE);