diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c
index 7652d9e238597f1ca673b394d761f00c26a1d52d..20956bcf977b949d405184772cc1ad4c16d5e76c 100644
--- a/libavformat/cafdec.c
+++ b/libavformat/cafdec.c
@@ -310,6 +310,8 @@ static int read_header(AVFormatContext *s)
                    "skipping CAF chunk: %08"PRIX32" (%s), size %"PRId64"\n",
                    tag, av_fourcc2str(av_bswap32(tag)), size);
         case MKBETAG('f','r','e','e'):
+            if (size < 0 && found_data)
+                goto found_data;
             if (size < 0)
                 return AVERROR_INVALIDDATA;
             break;
@@ -325,6 +327,7 @@ static int read_header(AVFormatContext *s)
     if (!found_data)
         return AVERROR_INVALIDDATA;
 
+found_data:
     if (caf->bytes_per_packet > 0 && caf->frames_per_packet > 0) {
         if (caf->data_size > 0)
             st->nb_frames = (caf->data_size / caf->bytes_per_packet) * caf->frames_per_packet;