diff --git a/doh-server/google.go b/doh-server/google.go
index 9ab6607..e670de0 100644
--- a/doh-server/google.go
+++ b/doh-server/google.go
@@ -180,9 +180,9 @@ func (s *Server) generateResponseGoogle(w http.ResponseWriter, r *http.Request,
 	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
 	if respJSON.HaveTTL {
 		if req.isTailored {
-			w.Header().Set("Cache-Control", "public, max-age="+strconv.Itoa(int(respJSON.LeastTTL)))
-		} else {
 			w.Header().Set("Cache-Control", "private, max-age="+strconv.Itoa(int(respJSON.LeastTTL)))
+		} else {
+			w.Header().Set("Cache-Control", "public, max-age="+strconv.Itoa(int(respJSON.LeastTTL)))
 		}
 		w.Header().Set("Expires", respJSON.EarliestExpires.Format(http.TimeFormat))
 	}
diff --git a/doh-server/ietf.go b/doh-server/ietf.go
index fec2c6f..981d402 100644
--- a/doh-server/ietf.go
+++ b/doh-server/ietf.go
@@ -150,9 +150,9 @@ func (s *Server) generateResponseIETF(w http.ResponseWriter, r *http.Request, re
 	w.Header().Set("Last-Modified", now)
 	if respJSON.HaveTTL {
 		if req.isTailored {
-			w.Header().Set("Cache-Control", "public, max-age="+strconv.Itoa(int(respJSON.LeastTTL)))
-		} else {
 			w.Header().Set("Cache-Control", "private, max-age="+strconv.Itoa(int(respJSON.LeastTTL)))
+		} else {
+			w.Header().Set("Cache-Control", "public, max-age="+strconv.Itoa(int(respJSON.LeastTTL)))
 		}
 		w.Header().Set("Expires", respJSON.EarliestExpires.Format(http.TimeFormat))
 	}