diff --git a/mods/ITEMS/mcl_spyglass/init.lua b/mods/ITEMS/mcl_spyglass/init.lua
index fa1a82339..ab557ebbf 100644
--- a/mods/ITEMS/mcl_spyglass/init.lua
+++ b/mods/ITEMS/mcl_spyglass/init.lua
@@ -17,6 +17,8 @@ minetest.register_craft({
 	}
 })
 
+mcl_fovapi.register_modifier("spyglass", 8, 0.1,false, true, nil, nil)
+
 local spyglass_scope = {}
 
 local function add_scope(player)
@@ -37,7 +39,8 @@ local function remove_scope(player)
 		player:hud_remove(spyglass_scope[player])
 		spyglass_scope[player] = nil
 		player:hud_set_flags({wielditem = true})
-		player:set_fov(86.1)
+		mcl_fovapi.remove_modifier(player, "spyglass") -- use the api to remove the FOV effect.
+		-- old code: player:set_fov(86.1)
 	end
 end
 
@@ -55,7 +58,8 @@ controls.register_on_hold(function(player, key, time)
 	if key ~= "RMB" then return end
 	local wielditem = player:get_wielded_item()
 	if wielditem:get_name() == "mcl_spyglass:spyglass" then
-		player:set_fov(8, false, 0.1)
+		mcl_fovapi.apply_modifier(player, "spyglass") -- apply the FOV effect.
+		-- old code: player:set_fov(8, false, 0.1)
 		if spyglass_scope[player] == nil then
 			add_scope(player)
 		end