diff --git a/libavcodec/nuv.c b/libavcodec/nuv.c
index 3d394b50c6..d9f0162a6d 100644
--- a/libavcodec/nuv.c
+++ b/libavcodec/nuv.c
@@ -123,7 +123,7 @@ static int codec_reinit(AVCodecContext *avctx, int width, int height,
         get_quant_quality(c, quality);
     if (width != c->width || height != c->height) {
         // also reserve space for a possible additional header
-        int buf_size = height * width * 3 / 2
+        int64_t buf_size = height * (int64_t)width * 3 / 2
                      + FFMAX(AV_LZO_OUTPUT_PADDING, AV_INPUT_BUFFER_PADDING_SIZE)
                      + RTJPEG_HEADER_SIZE;
         if (buf_size > INT_MAX/8)