diff --git a/libavformat/vividas.c b/libavformat/vividas.c
index 130b81ebbe..bec4ad7cec 100644
--- a/libavformat/vividas.c
+++ b/libavformat/vividas.c
@@ -567,7 +567,8 @@ static int viv_read_header(AVFormatContext *s)
     v = avio_r8(pb);
     avio_seek(pb, v, SEEK_CUR);
 
-    avio_read(pb, keybuffer, 187);
+    if (avio_read(pb, keybuffer, 187) != 187)
+        return AVERROR_INVALIDDATA;
     key = decode_key(keybuffer);
     viv->sb_key = key;