@@ -267,7 +267,7 @@ static av_cold int init_subtitles(AVFilterContext *ctx, const char *args)

     AVFormatContext *fmt = NULL;

     AVCodecContext *dec_ctx = NULL;

     AVCodec *dec = NULL;

-    AVCodecDescriptor *dec_desc;

+    const AVCodecDescriptor *dec_desc;

     AVStream *st;

     AVPacket pkt;

     AssContext *ass = ctx->priv;