diff --git a/[core]/es_extended/server/functions.lua b/[core]/es_extended/server/functions.lua
index 77db980a..b6a25a29 100644
--- a/[core]/es_extended/server/functions.lua
+++ b/[core]/es_extended/server/functions.lua
@@ -371,7 +371,7 @@ function ESX.IsPlayerLoaded(source)
 end
 
 ---@param playerId number | string
----@return string
+---@return string?
 function ESX.GetIdentifier(playerId)
     local fxDk = GetConvarInt("sv_fxdkMode", 0)
     if fxDk == 1 then