diff --git a/WeakAuras/compat.lua b/WeakAuras/compat.lua
index cc091b6..0fd50e1 100644
--- a/WeakAuras/compat.lua
+++ b/WeakAuras/compat.lua
@@ -57,18 +57,6 @@ function tIndexOf(tbl, item)
 	end
 end
 
-local oldGetInstanceDifficulty = GetInstanceDifficulty
-function GetInstanceDifficulty()
-	local diff = oldGetInstanceDifficulty()
-	if diff == 1 then
-		local _, _, difficulty, _, maxPlayers = GetInstanceInfo()
-		if difficulty == 1 and maxPlayers == 25 then
-			diff = 2
-		end
-	end
-	return diff
-end
-
 function IsInGroup()
 	return (GetNumRaidMembers() == 0 and GetNumPartyMembers() > 0)
 end