diff --git a/libavcodec/ptx.c b/libavcodec/ptx.c
index 67799fac9e..ac3e7116f3 100644
--- a/libavcodec/ptx.c
+++ b/libavcodec/ptx.c
@@ -38,7 +38,6 @@ static av_cold int ptx_init(AVCodecContext *avctx) {
 static int ptx_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
                             AVPacket *avpkt) {
     const uint8_t *buf = avpkt->data;
-    int buf_size = avpkt->size;
     PTXContext * const s = avctx->priv_data;
     AVFrame *picture = data;
     AVFrame * const p = &s->picture;
diff --git a/libavcodec/sunrast.c b/libavcodec/sunrast.c
index 8a78f1aab4..3fe8f6fffb 100644
--- a/libavcodec/sunrast.c
+++ b/libavcodec/sunrast.c
@@ -45,7 +45,6 @@ static av_cold int sunrast_init(AVCodecContext *avctx) {
 static int sunrast_decode_frame(AVCodecContext *avctx, void *data,
                                 int *data_size, AVPacket *avpkt) {
     const uint8_t *buf = avpkt->data;
-    int buf_size = avpkt->size;
     SUNRASTContext * const s = avctx->priv_data;
     AVFrame *picture = data;
     AVFrame * const p = &s->picture;
diff --git a/libavcodec/txd.c b/libavcodec/txd.c
index d2c743feed..a3cbde5f0b 100644
--- a/libavcodec/txd.c
+++ b/libavcodec/txd.c
@@ -41,7 +41,6 @@ static av_cold int txd_init(AVCodecContext *avctx) {
 static int txd_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
                             AVPacket *avpkt) {
     const uint8_t *buf = avpkt->data;
-    int buf_size = avpkt->size;
     TXDContext * const s = avctx->priv_data;
     AVFrame *picture = data;
     AVFrame * const p = &s->picture;