diff --git a/libavcodec/sonic.c b/libavcodec/sonic.c
index b67434f9ca..a96e687748 100644
--- a/libavcodec/sonic.c
+++ b/libavcodec/sonic.c
@@ -596,10 +596,6 @@ static av_cold int sonic_encode_init(AVCodecContext *avctx)
     av_log(avctx, AV_LOG_INFO, "Sonic: ver: %d ls: %d dr: %d taps: %d block: %d frame: %d downsamp: %d\n",
         version, s->lossless, s->decorrelation, s->num_taps, s->block_align, s->frame_size, s->downsampling);
 
-    avctx->coded_frame = avcodec_alloc_frame();
-    if (!avctx->coded_frame)
-        return AVERROR(ENOMEM);
-    avctx->coded_frame->key_frame = 1;
     avctx->frame_size = s->block_align*s->downsampling;
 
     return 0;
@@ -610,8 +606,6 @@ static av_cold int sonic_encode_close(AVCodecContext *avctx)
     SonicContext *s = avctx->priv_data;
     int i;
 
-    av_freep(&avctx->coded_frame);
-
     for (i = 0; i < s->channels; i++)
         av_free(s->coded_samples[i]);