diff --git a/interactions.go b/interactions.go
index ae8a3b2..201baa8 100644
--- a/interactions.go
+++ b/interactions.go
@@ -36,6 +36,7 @@ const (
 	ApplicationCommandOptionUser
 	ApplicationCommandOptionChannel
 	ApplicationCommandOptionRole
+	ApplicationCommandOptionMentionable
 )
 
 // ApplicationCommandOption represents an option/subcommand/subcommands group.