diff --git a/libavcodec/mpegaudio_parser.c b/libavcodec/mpegaudio_parser.c
index b66e8b0561..a358069dab 100644
--- a/libavcodec/mpegaudio_parser.c
+++ b/libavcodec/mpegaudio_parser.c
@@ -98,6 +98,8 @@ static int mpegaudio_parse(AVCodecParserContext *s1,
                     } else if (codec_id == AV_CODEC_ID_MP3ADU) {
                         avpriv_report_missing_feature(avctx,
                             "MP3ADU full parser");
+                        *poutbuf = NULL;
+                        *poutbuf_size = 0;
                         return 0; /* parsers must not return error codes */
                     }