4 files changed, 4 insertions, 4 deletions
diff --git a/gamemode/npcsystem/npcs/antlion1.lua b/gamemode/npcsystem/npcs/antlion1.lua
index d772603..c9ae1b6 100644
--- a/gamemode/npcsystem/npcs/antlion1.lua
+++ b/gamemode/npcsystem/npcs/antlion1.lua
@@ -87,7 +87,7 @@ NPC.Attacks         = {
 
 --Attack priority is a fucntion that takes a player, and returns an int describing it's prority to attack (higher = more important) NPC will always attack the player with the highest priority
 function NPC:AttackPriority(ply)
-    if not ply then return 0 end
+    if not ply or not ply:IsValid() then return 0 end
     local plypos = ply:GetPos()
     local mypos = self:GetPos()
     if not plypos then return 0 end
diff --git a/gamemode/npcsystem/npcs/antlion2.lua b/gamemode/npcsystem/npcs/antlion2.lua
index 5d1a435..e50cce4 100644
--- a/gamemode/npcsystem/npcs/antlion2.lua
+++ b/gamemode/npcsystem/npcs/antlion2.lua
@@ -109,7 +109,7 @@ NPC.Attacks         = {
 
 --Attack priority is a fucntion that takes a player, and returns an int describing it's prority to attack (higher = more important) NPC will always attack the player with the highest priority
 function NPC:AttackPriority(ply)
-    if not ply then return 0 end
+    if not ply or not ply:IsValid() then return 0 end
     local plypos = ply:GetPos()
     local mypos = self:GetPos()
     if not plypos then return 0 end
diff --git a/gamemode/npcsystem/npcs/bird.lua b/gamemode/npcsystem/npcs/bird.lua
index af63e76..55a5c3d 100644
--- a/gamemode/npcsystem/npcs/bird.lua
+++ b/gamemode/npcsystem/npcs/bird.lua
@@ -38,7 +38,7 @@ end
 local dorun = function(self,ply)
     self:StartActivity(ACT_FLY)
     self:PlaySequenceAndWait( "Fly01" )
-
+    if(not ply or not ply:IsValid()) then return end
     --Find a position in roughly the oposite direction of the player
     local tpos = self:GetPos()
     local ppos = ply:GetPos()
diff --git a/gamemode/npcsystem/npcs/zombie.lua b/gamemode/npcsystem/npcs/zombie.lua
index c18083e..de4a389 100644
--- a/gamemode/npcsystem/npcs/zombie.lua
+++ b/gamemode/npcsystem/npcs/zombie.lua
@@ -88,7 +88,7 @@ NPC.Attacks         = {
 
 --Attack priority is a fucntion that takes a player, and returns an int describing it's prority to attack (higher = more important) NPC will always attack the player with the highest priority
 function NPC:AttackPriority(ply)
-    if not ply then return end
+    if not ply or not ply:IsValid() then return end
     local plypos = ply:GetPos()
     local mypos = self:GetPos()
     if not plypos then return 0 end