diff --git a/LibDogTag-Unit-3.0.lua b/LibDogTag-Unit-3.0.lua
index 08abc86..01a64c4 100644
--- a/LibDogTag-Unit-3.0.lua
+++ b/LibDogTag-Unit-3.0.lua
@@ -116,9 +116,11 @@ for i = 1, 4 do
 	IsLegitimateUnit["party" .. i] = true
 	IsLegitimateUnit["partypet" .. i] = true
 	IsLegitimateUnit["party" .. i .. "pet"] = true
+	IsLegitimateUnit["boss" .. i] = true
 	IsNormalUnit["party" .. i] = true
 	IsNormalUnit["partypet" .. i] = true
 	IsNormalUnit["party" .. i .. "pet"] = true
+	IsNormalUnit["boss" .. i] = true
 	WACKY_UNITS["party" .. i .. "target"] = true
 	WACKY_UNITS["partypet" .. i .. "target"] = true
 	WACKY_UNITS["party" .. i .. "pettarget"] = true
@@ -414,6 +416,13 @@ DogTag:AddEventHandler("Unit", "UPDATE_MOUSEOVER_UNIT", function(event, ...)
 	DogTag:FireEvent("UnitChanged", "mouseover")
 end)
 
+DogTag:AddEventHandler("Unit", "INSTANCE_ENCOUNTER_ENGAGE_UNIT", function(event, ...)
+	for i = 1, 4 do
+		refreshGUID("boss"..i)
+		DogTag:FireEvent("UnitChanged", "boss"..i)
+	end
+end)
+
 local fsToKwargs = DogTag.fsToKwargs
 local fsToNSList = DogTag.fsToNSList
 local fsNeedUpdate = DogTag.fsNeedUpdate