diff --git a/template.go b/template.go
index f937a6f..8280536 100644
--- a/template.go
+++ b/template.go
@@ -42,6 +42,7 @@ func init() {
     }
 }
 
+// MarshalJSON returns *r as the JSON encoding of r.
 func (r {{$typename}}) MarshalJSON() ([]byte, error) {
     if s, ok := interface{}(r).(fmt.Stringer); ok {
         return json.Marshal(s.String())
@@ -53,6 +54,7 @@ func (r {{$typename}}) MarshalJSON() ([]byte, error) {
     return json.Marshal(s)
 }
 
+// UnmarshalJSON sets *r to a copy of data.
 func (r *{{$typename}}) UnmarshalJSON(data []byte) error {
     var s string
     if err := json.Unmarshal(data, &s); err != nil {