diff --git a/mods/default/nodes.lua b/mods/default/nodes.lua
index 8537d9e8..e9387a58 100644
--- a/mods/default/nodes.lua
+++ b/mods/default/nodes.lua
@@ -2604,6 +2604,9 @@ local function register_sign(material, desc, def)
 			meta:set_string("formspec", "field[text;;${text}]")
 		end,
 		on_receive_fields = function(pos, formname, fields, sender)
+			if not fields.quit then
+				return -- workaround for https://github.com/luanti-org/luanti/issues/16187
+			end
 			local player_name = sender:get_player_name()
 			if minetest.is_protected(pos, player_name) then
 				minetest.record_protection_violation(pos, player_name)