diff --git a/server/main.lua b/server/main.lua
index d6994a7e..7327c49e 100644
--- a/server/main.lua
+++ b/server/main.lua
@@ -492,7 +492,8 @@ AddEventHandler('esx_policejob:forceBlip', function()
 end)
 
 ESX.RegisterServerCallback('esx_policejob:isCop', function(source, cb)
-	local xPlayer = ESX.GetPlayerFromId(source)
+	local _source = source
+	local xPlayer = ESX.GetPlayerFromId(_source)
 	cb(xPlayer ~= nil and xPlayer.job ~= nil and xPlayer.job.name == 'police')
 end)
 
@@ -501,4 +502,4 @@ AddEventHandler('onResourceStart', function(resource)
 		Citizen.Wait(5000)
 		TriggerClientEvent('esx_policejob:updateBlip', -1)
 	end
-end)
\ No newline at end of file
+end)