diff --git a/component/sniffer/dispatcher.go b/component/sniffer/dispatcher.go
index 96e9272c..97bf1629 100644
--- a/component/sniffer/dispatcher.go
+++ b/component/sniffer/dispatcher.go
@@ -116,14 +116,13 @@ func (sd *SnifferDispatcher) TCPSniff(conn *N.BufferedConn, metadata *C.Metadata
 }
 
 func (sd *SnifferDispatcher) replaceDomain(metadata *C.Metadata, host string, overrideDest bool) {
-	// show log early, since the following code may mutate `metadata.Host`
-	log.Debugln("[Sniffer] Sniff %s [%s]-->[%s] success, replace domain [%s]-->[%s]",
-		metadata.NetWork,
-		metadata.SourceDetail(),
-		metadata.RemoteAddress(),
-		metadata.Host, host)
 	metadata.SniffHost = host
 	if overrideDest {
+		log.Debugln("[Sniffer] Sniff %s [%s]-->[%s] success, replace domain [%s]-->[%s]",
+			metadata.NetWork,
+			metadata.SourceDetail(),
+			metadata.RemoteAddress(),
+			metadata.Host, host)
 		metadata.Host = host
 	}
 	metadata.DNSMode = C.DNSNormal