diff --git a/component/sniffer/dispatcher.go b/component/sniffer/dispatcher.go
index 6cc8cee2..5d457cf1 100644
--- a/component/sniffer/dispatcher.go
+++ b/component/sniffer/dispatcher.go
@@ -115,7 +115,7 @@ func (sd *Dispatcher) TCPSniff(conn *N.BufferedConn, metadata *C.Metadata) bool
 		host, err := sd.sniffDomain(conn, metadata)
 		if err != nil {
 			if !forceSniffer {
-			sd.cacheSniffFailed(metadata)
+				sd.cacheSniffFailed(metadata)
 			}
 			log.Debugln("[Sniffer] All sniffing sniff failed with from [%s:%d] to [%s:%d]", metadata.SrcIP, metadata.SrcPort, metadata.String(), metadata.DstPort)
 			return false