diff --git a/util.go b/util.go
index 84ccb0a..8d10265 100644
--- a/util.go
+++ b/util.go
@@ -20,7 +20,7 @@ func nodesForHeight(bitWidth uint, height int) uint64 {
 	return 1 << heightLogTwo
 }
 
-var bufferPool sync.Pool = sync.Pool{
+var bufferPool = sync.Pool{
 	New: func() any {
 		return bytes.NewBuffer(nil)
 	},