diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 3d4b0242a1..3eb4a1e3fb 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -1006,8 +1006,8 @@ void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
 #if FF_API_PKT_DUMP
 attribute_deprecated void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
 attribute_deprecated void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt,
-#endif
                                           int dump_payload);
+#endif
 
 /**
  * Initialize libavformat and register all the muxers, demuxers and
diff --git a/libavformat/daud.c b/libavformat/daud.c
index 7aa1b6dad2..6a36d28acb 100644
--- a/libavformat/daud.c
+++ b/libavformat/daud.c
@@ -57,6 +57,11 @@ static int daud_write_header(struct AVFormatContext *s)
 
 static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 {
+    if (pkt->size > 65535) {
+        av_log(s, AV_LOG_ERROR,
+               "Packet size too large for s302m. (%d > 65535)\n", pkt->size);
+        return -1;
+    }
     avio_wb16(s->pb, pkt->size);
     avio_wb16(s->pb, 0x8010); // unknown
     avio_write(s->pb, pkt->data, pkt->size);