diff --git a/models/activitypub/actor.go b/models/activitypub/actor.go
index 966b1c1c7d..f27ad1bf38 100644
--- a/models/activitypub/actor.go
+++ b/models/activitypub/actor.go
@@ -6,7 +6,7 @@ import (
 	"strings"
 )
 
-type Validatable interface {
+type Validatable interface { // ToDo: What is the right package for this interface?
 	validate_is_not_nil() error
 	validate_is_not_empty() error
 	Validate() error