diff --git a/weed/s3api/filer_util_tags.go b/weed/s3api/filer_util_tags.go
index fde8e243e..bdc8f31da 100644
--- a/weed/s3api/filer_util_tags.go
+++ b/weed/s3api/filer_util_tags.go
@@ -7,7 +7,7 @@ import (
 )
 
 const (
-	S3TAG_PREFIX = "s3-tag-"
+	S3TAG_PREFIX = "x-amz-tagging-"
 )
 
 func (s3a *S3ApiServer) getTags(parentDirectoryPath string, entryName string) (tags map[string]string, err error) {
diff --git a/weed/server/filer_server_handlers_read.go b/weed/server/filer_server_handlers_read.go
index ca584f9f6..1fb24369b 100644
--- a/weed/server/filer_server_handlers_read.go
+++ b/weed/server/filer_server_handlers_read.go
@@ -97,7 +97,7 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request,
 	if r.Method == "GET" {
 		tagCount := 0
 		for k, _ := range entry.Extended {
-			if strings.HasPrefix(k, "s3-tag-") {
+			if strings.HasPrefix(k, "x-amz-tagging") {
 				tagCount++
 			}
 		}