diff --git a/doc/APIchanges b/doc/APIchanges
index 1a9f0a303e..326a3c721c 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -14,6 +14,9 @@ libavutil:     2021-04-27
 
 API changes, most recent first:
 
+2022-03-30 - xxxxxxxxxx - lavc 59.26.100 - avcodec.h
+  avcodec_decode_subtitle2() now accepts const AVPacket*.
+
 2022-03-16 - xxxxxxxxxx - all libraries - version_major.h
   Add lib<name>/version_major.h as new installed headers, which only
   contain the major version number (and corresponding API deprecation
diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index 6d62bdc7b0..979e33c9ab 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -2491,8 +2491,8 @@ fail:
     return err < 0 ? err : ret;
 }
 
-static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output,
-                               int *decode_failed)
+static int transcode_subtitles(InputStream *ist, const AVPacket *pkt,
+                               int *got_output, int *decode_failed)
 {
     AVSubtitle subtitle;
     int free_sub = 1;
diff --git a/fftools/ffprobe.c b/fftools/ffprobe.c
index 05c167eeb5..d2aacb6a0d 100644
--- a/fftools/ffprobe.c
+++ b/fftools/ffprobe.c
@@ -2629,7 +2629,7 @@ static void show_frame(WriterContext *w, AVFrame *frame, AVStream *stream,
 
 static av_always_inline int process_frame(WriterContext *w,
                                           InputFile *ifile,
-                                          AVFrame *frame, AVPacket *pkt,
+                                          AVFrame *frame, const AVPacket *pkt,
                                           int *packet_new)
 {
     AVFormatContext *fmt_ctx = ifile->fmt_ctx;
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 4dae23d06e..64804c2a50 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -2544,8 +2544,7 @@ enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos);
  * @param[in] avpkt The input AVPacket containing the input buffer.
  */
 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
-                            int *got_sub_ptr,
-                            AVPacket *avpkt);
+                             int *got_sub_ptr, const AVPacket *avpkt);
 
 /**
  * Supply raw packet data as input to a decoder.
diff --git a/libavcodec/decode.c b/libavcodec/decode.c
index e51a39e70a..8bb6e8c265 100644
--- a/libavcodec/decode.c
+++ b/libavcodec/decode.c
@@ -751,8 +751,8 @@ static void get_subtitle_defaults(AVSubtitle *sub)
 }
 
 #define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */
-static int recode_subtitle(AVCodecContext *avctx, AVPacket **outpkt,
-                           AVPacket *inpkt, AVPacket *buf_pkt)
+static int recode_subtitle(AVCodecContext *avctx, const AVPacket **outpkt,
+                           const AVPacket *inpkt, AVPacket *buf_pkt)
 {
 #if CONFIG_ICONV
     iconv_t cd = (iconv_t)-1;
@@ -832,8 +832,7 @@ static int utf8_check(const uint8_t *str)
 }
 
 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
-                             int *got_sub_ptr,
-                             AVPacket *avpkt)
+                             int *got_sub_ptr, const AVPacket *avpkt)
 {
     int ret = 0;
 
@@ -853,7 +852,7 @@ int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
 
     if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) {
         AVCodecInternal *avci = avctx->internal;
-        AVPacket *pkt;
+        const AVPacket *pkt;
 
         ret = recode_subtitle(avctx, &pkt, avpkt, avci->buffer_pkt);
         if (ret < 0)
diff --git a/libavcodec/version.h b/libavcodec/version.h
index a744e7469f..26ee41eb1f 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,7 +29,7 @@
 
 #include "version_major.h"
 
-#define LIBAVCODEC_VERSION_MINOR  25
+#define LIBAVCODEC_VERSION_MINOR  26
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index 288aa63313..bb9fad613d 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -81,8 +81,8 @@ static const FFCodec *AVCodecInitialize(enum AVCodecID codec_id)
     return ffcodec(res);
 }
 
-static int subtitle_handler(AVCodecContext *avctx, void *frame,
-                            int *got_sub_ptr, AVPacket *avpkt)
+static int subtitle_handler(AVCodecContext *avctx, AVFrame *unused,
+                            int *got_sub_ptr, const AVPacket *avpkt)
 {
     AVSubtitle sub;
     int ret = avcodec_decode_subtitle2(avctx, &sub, got_sub_ptr, avpkt);
