diff --git a/post-policy.go b/post-policy.go
index 6d42488e5..4cc9e24d5 100644
--- a/post-policy.go
+++ b/post-policy.go
@@ -19,12 +19,14 @@ package minio
 
 import (
 	"encoding/base64"
+	"errors"
 	"fmt"
 	"net/http"
 	"strings"
 	"time"
 
 	"github.com/minio/minio-go/v7/pkg/encrypt"
+	"github.com/minio/minio-go/v7/pkg/tags"
 )
 
 // expirationDateFormat date format for expiration key in json policy.
@@ -157,6 +159,10 @@ func (p *PostPolicy) SetTagging(tagging string) error {
 	if strings.TrimSpace(tagging) == "" || tagging == "" {
 		return errInvalidArgument("No tagging specified.")
 	}
+	_, err := tags.ParseObjectXML(strings.NewReader(tagging))
+	if err != nil {
+		return errors.New("The XML you provided was not well-formed or did not validate against our published schema.")
+	}
 	policyCond := policyCondition{
 		matchType: "eq",
 		condition: "$tagging",