diff --git a/ShadowedUnitFrames.lua b/ShadowedUnitFrames.lua
index d0db7dc1b..fb2b4e78c 100644
--- a/ShadowedUnitFrames.lua
+++ b/ShadowedUnitFrames.lua
@@ -4,6 +4,18 @@
 
 ShadowUF = select(2, ...)
 local L = ShadowUF.L
+
+-- Fix for MoP Classic 5.5.4: DebuffTypeColor was removed by Blizzard
+if not DebuffTypeColor then
+    DebuffTypeColor = {
+        ["Magic"]   = {r = 0.2, g = 0.6, b = 1.0},
+        ["Curse"]   = {r = 0.6, g = 0.0, b = 1.0},
+        ["Disease"] = {r = 0.6, g = 0.4, b = 0.0},
+        ["Poison"]  = {r = 0.0, g = 0.5, b = 0.0},
+        ["none"]    = {r = 0.8, g = 0.0, b = 0.0},
+    }
+end
+
 ShadowUF.dbRevision = 1
 ShadowUF.playerUnit = "player"
 ShadowUF.enabledUnits = {}
@@ -567,4 +579,4 @@ frame:SetScript("OnEvent", function(self, event, addon)
 		ShadowUF:OnInitialize()
 		self:UnregisterEvent("PLAYER_LOGIN")
 	end
-end)
\ No newline at end of file
+end)