diff --git a/libavcodec/binkaudio.c b/libavcodec/binkaudio.c
index 8db4533221..ffa32d12aa 100644
--- a/libavcodec/binkaudio.c
+++ b/libavcodec/binkaudio.c
@@ -306,6 +306,7 @@ static int decode_frame(AVCodecContext *avctx, void *data,
         buf = av_realloc(s->packet_buffer, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
         if (!buf)
             return AVERROR(ENOMEM);
+        memset(buf + avpkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
         s->packet_buffer = buf;
         memcpy(s->packet_buffer, avpkt->data, avpkt->size);
         if ((ret = init_get_bits8(gb, s->packet_buffer, avpkt->size)) < 0)