diff --git a/cmd/godoc/x.go b/cmd/godoc/x.go
index 4544b050..dc5a7039 100644
--- a/cmd/godoc/x.go
+++ b/cmd/godoc/x.go
@@ -37,9 +37,11 @@ var xMap = map[string]xRepo{
 	"oauth2":     {"https://go.googlesource.com/oauth2", "git"},
 	"playground": {"https://go.googlesource.com/playground", "git"},
 	"review":     {"https://go.googlesource.com/review", "git"},
+	"sync":       {"https://go.googlesource.com/sync", "git"},
 	"sys":        {"https://go.googlesource.com/sys", "git"},
 	"talks":      {"https://go.googlesource.com/talks", "git"},
 	"text":       {"https://go.googlesource.com/text", "git"},
+	"time":       {"https://go.googlesource.com/time", "git"},
 	"tools":      {"https://go.googlesource.com/tools", "git"},
 	"tour":       {"https://go.googlesource.com/tour", "git"},
 }