diff --git a/Northstar.CustomServers/mod/scripts/vscripts/mp/_challenges.gnut b/Northstar.CustomServers/mod/scripts/vscripts/mp/_challenges.gnut
index 4b866a40f..ffefc3b4e 100644
--- a/Northstar.CustomServers/mod/scripts/vscripts/mp/_challenges.gnut
+++ b/Northstar.CustomServers/mod/scripts/vscripts/mp/_challenges.gnut
@@ -66,6 +66,9 @@ void function SetupPlayerMenuChallenges( entity player )
 void function SetupChallenges_Threaded( entity player )
 {
 	WaitFrame()
+
+        if ( !IsValid( player ) )
+            return
 	
 	Remote_CallFunction_UI( player, "SCB_SetCompleteMeritState", 0 )
 	Remote_CallFunction_UI( player, "SCB_SetEvacMeritState", 4 ) //4 tells RUI to hide it