diff --git a/unmaintained/s3/presigned_put/presigned_put.go b/unmaintained/s3/presigned_put/presigned_put.go
index e8368d124..ba135ff25 100644
--- a/unmaintained/s3/presigned_put/presigned_put.go
+++ b/unmaintained/s3/presigned_put/presigned_put.go
@@ -1,15 +1,16 @@
 package main
 
 import (
+	"crypto/md5"
+	"encoding/base64"
+	"fmt"
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/aws/session"
 	"github.com/aws/aws-sdk-go/service/s3"
-	"encoding/base64"
-	"fmt"
-	"crypto/md5"
+	"github.com/seaweedfs/seaweedfs/weed/util"
+	"net/http"
 	"strings"
 	"time"
-	"net/http"
 )
 
 // Downloads an item from an S3 Bucket in the region configured in the shared config
@@ -63,6 +64,7 @@ func main() {
 		fmt.Printf("error put request: %v\n", err)
 		return
 	}
+	defer util.CloseResponse(resp)
 	fmt.Printf("response: %+v\n", resp)
 }
 
@@ -70,4 +72,4 @@ var stringContent = `Generate a Pre-Signed URL for an Amazon S3 PUT Operation wi
 You can generate a pre-signed URL for a PUT operation that checks whether users upload the correct content. When the SDK pre-signs a request, it computes the checksum of the request body and generates an MD5 checksum that is included in the pre-signed URL. Users must upload the same content that produces the same MD5 checksum generated by the SDK; otherwise, the operation fails. This is not the Content-MD5, but the signature. To enforce Content-MD5, simply add the header to the request.
 
 The following example adds a Body field to generate a pre-signed PUT operation that requires a specific payload to be uploaded by users.
-`
\ No newline at end of file
+`