diff --git a/gamemodes/zombiesurvival/gamemode/init.lua b/gamemodes/zombiesurvival/gamemode/init.lua
index 1098564..8b7d691 100644
--- a/gamemodes/zombiesurvival/gamemode/init.lua
+++ b/gamemodes/zombiesurvival/gamemode/init.lua
@@ -791,7 +791,7 @@ function GM:PlayerSelectSpawn(pl)
 				local blocked
 				local spawnpos = spawn:GetPos()
 				for _, ent in pairs(ents.FindInBox(spawnpos + playermins, spawnpos + playermaxs)) do
-					if ent and ent:IsValid() and ent:IsPlayer() and not spawninplayer or string.sub(ent:GetClass(), 1, 5) == "prop_" then
+					if IsValid(ent) and ent:IsPlayer() and not spawninplayer or string.sub(ent:GetClass(), 1, 5) == "prop_" then
 						blocked = true
 						break
 					end