diff --git a/command_npc_talk_generic.lua b/command_npc_talk_generic.lua
index eed17ae..1deffa8 100644
--- a/command_npc_talk_generic.lua
+++ b/command_npc_talk_generic.lua
@@ -24,6 +24,10 @@ minetest.register_chatcommand( 'npc_talk_generic', {
 				local res = yl_speak_up.check_and_add_as_generic_dialog(dialog, n_id)
 				minetest.chat_send_player(pname, "Adding NPC "..tostring(n_id).."..: "..tostring(res))
 				do_reload = true
+			elseif(parts[1] == "add" and i ~= -1) then
+				minetest.chat_send_player(pname, "NPC "..tostring(parts[2])..
+					" is already registered as a generic NPC. You may try to "..
+					"remove and add it again if something went wrong.")
 			elseif(parts[1] == "remove" and i ~= -1) then
 				table.remove(generic_npc_list, i)
 				minetest.chat_send_player(pname, "Removing NPC "..tostring(parts[2]).." ..")