diff --git a/gzip.go b/gzip.go
index 14124b9..ef75ceb 100644
--- a/gzip.go
+++ b/gzip.go
@@ -155,9 +155,15 @@ func (z *Writer) init(w io.Writer, level int) {
 	z.Extra = nil
 	z.ModTime = time.Time{}
 	z.wroteHeader = false
-	z.currentBuffer = nil
+	if z.currentBuffer != nil {
+		z.dstPool.Put(z.currentBuffer)
+		z.currentBuffer = nil
+	}
 	z.buf = [10]byte{}
-	z.prevTail = nil
+	if z.prevTail != nil {
+		z.dstPool.Put(z.prevTail)
+		z.prevTail = nil
+	}
 	z.size = 0
 	if z.dictFlatePool.New == nil {
 		z.dictFlatePool.New = func() any {