diff --git a/tunnel/tunnel.go b/tunnel/tunnel.go
index bda5c1ad..b686eae6 100644
--- a/tunnel/tunnel.go
+++ b/tunnel/tunnel.go
@@ -204,12 +204,15 @@ func preHandleMetadata(metadata *C.Metadata) error {
 			} else if node, ok := resolver.DefaultHosts.Search(host, false); ok {
 				// redir-host should lookup the hosts
 				metadata.DstIP, _ = node.RandIP()
-			}else if node!=nil&&node.IsDomain{
-				metadata.Host=node.Domain
+			} else if node != nil && node.IsDomain {
+				metadata.Host = node.Domain
 			}
 		} else if resolver.IsFakeIP(metadata.DstIP) {
 			return fmt.Errorf("fake DNS record %s missing", metadata.DstIP)
 		}
+	} else if node, ok := resolver.DefaultHosts.Search(metadata.Host, true); ok {
+		// try use domain mapping
+		metadata.Host = node.Domain
 	}
 
 	return nil