@@ -274,7 +274,7 @@ static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt)

                 } else if(t & 0x40){ /* copy with offset */

                     off = avio_r8(s->pb);

                     j = (t & 0x3F) + 1;

-                    if (off + j > 0xff) {

+                    if (off + j > 0x100) {

                         av_log(s, AV_LOG_ERROR,

                                "Invalid palette update, offset=%d length=%d extends beyond palette size\n",

                                off, j);