diff --git a/libavcodec/snow.c b/libavcodec/snow.c
index dcaa682fc8..c24dacaaa8 100644
--- a/libavcodec/snow.c
+++ b/libavcodec/snow.c
@@ -4406,7 +4406,7 @@ static int decode_init(AVCodecContext *avctx)
 
     block_size = MB_SIZE >> s->block_max_depth;
 
-    slice_buffer_init(&s->sb, s->plane[0].height, (block_size) + (s->spatial_decomposition_count * 8) + 1, s->plane[0].width, s->spatial_idwt_buffer);
+    slice_buffer_init(&s->sb, s->plane[0].height, block_size + s->spatial_decomposition_count * 8 + 1, s->plane[0].width, s->spatial_idwt_buffer);
     return 0;
 }