diff --git a/libavcodec/dnxhdenc.c b/libavcodec/dnxhdenc.c
index 41d5005f14..c099f649e4 100644
--- a/libavcodec/dnxhdenc.c
+++ b/libavcodec/dnxhdenc.c
@@ -1058,7 +1058,7 @@ static int dnxhd_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
     DNXHDEncContext *ctx = avctx->priv_data;
     int first_field = 1;
     int offset, i, ret;
-    uint8_t *buf, *sd;
+    uint8_t *buf;
 
     if ((ret = ff_alloc_packet2(avctx, pkt, ctx->cid_table->frame_size)) < 0)
         return ret;
diff --git a/libavcodec/libxavs.c b/libavcodec/libxavs.c
index 69bc83af87..b8140ab672 100644
--- a/libavcodec/libxavs.c
+++ b/libavcodec/libxavs.c
@@ -117,7 +117,6 @@ static int XAVS_frame(AVCodecContext *avctx, AVPacket *pkt,
     xavs_nal_t *nal;
     int nnal, i, ret;
     xavs_picture_t pic_out;
-    uint8_t *sd;
     int pict_type;
 
     x4->pic.img.i_csp   = XAVS_CSP_I420;
diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index 6939ce5a23..f837b3f29d 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -1735,7 +1735,6 @@ int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
 
     /* output? */
     if (s->new_picture.f->data[0]) {
-        uint8_t *sd;
         int growing_buffer = context_count == 1 && !pkt->data && !s->data_partitioning;
         int pkt_size = growing_buffer ? FFMAX(s->mb_width*s->mb_height*64+10000, avctx->internal->byte_buffer_size) - FF_INPUT_BUFFER_PADDING_SIZE
                                               :
diff --git a/libavcodec/svq1enc.c b/libavcodec/svq1enc.c
index 6d5ff01b51..e49dee6268 100644
--- a/libavcodec/svq1enc.c
+++ b/libavcodec/svq1enc.c
@@ -574,7 +574,6 @@ static int svq1_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
 {
     SVQ1EncContext *const s = avctx->priv_data;
     int i, ret;
-    uint8_t *sd;
 
     if ((ret = ff_alloc_packet2(avctx, pkt, s->y_block_width * s->y_block_height *
                              MAX_MB_BYTES*3 + FF_MIN_BUFFER_SIZE)) < 0)