diff --git a/libavcodec/lclenc.c b/libavcodec/lclenc.c
index cbfd8fe8a8521ef40700e068824c601a1cba3247..263e66bdd09a030e91599e437a6e6e5d34ceb3a1 100644
--- a/libavcodec/lclenc.c
+++ b/libavcodec/lclenc.c
@@ -137,7 +137,9 @@ static av_cold int encode_init(AVCodecContext *avctx)
 
     av_assert0(avctx->width && avctx->height);
 
-    avctx->extradata= av_mallocz(8);
+    avctx->extradata = av_mallocz(8 + FF_INPUT_BUFFER_PADDING_SIZE);
+    if (!avctx->extradata)
+        return AVERROR(ENOMEM);
     avctx->coded_frame= &c->pic;
 
     c->compression = avctx->compression_level == FF_COMPRESSION_DEFAULT ?