diff --git a/src/text/template/template.go b/src/text/template/template.go
index 41cdd56..1135d81 100644
--- a/src/text/template/template.go
+++ b/src/text/template/template.go
@@ -50,6 +50,10 @@
 // New allocates a new, undefined template associated with the given one and with the same
 // delimiters. The association, which is transitive, allows one template to
 // invoke another with a {{template}} action.
+//
+// Because associated templates share underlying data, template construction
+// cannot be done safely in parallel. Once the templates are constructed, they
+// can be executed in parallel.
 func (t *Template) New(name string) *Template {
 	t.init()
 	nt := &Template{