diff --git a/ItemRack/ItemRack.lua b/ItemRack/ItemRack.lua
index ffcba35..3f96f92 100644
--- a/ItemRack/ItemRack.lua
+++ b/ItemRack/ItemRack.lua
@@ -6,6 +6,15 @@ local _
 local wowver, wowbuild, wowbuilddate, wowtoc = GetBuildInfo()
 ItemRack.Version = GetAddOnMetadata(addonName, "Version")
 
+-- by Mikinho - Fix for latest update for Classic Era/SoD v11504
+local GetMouseFocus = GetMouseFocus
+if not GetMouseFocus and GetMouseFoci then
+    local GetMouseFoci = GetMouseFoci
+          GetMouseFocus = function()
+          return GetMouseFoci()[1]
+      end
+end
+
 function ItemRack.IsClassic()
 	return WOW_PROJECT_ID == WOW_PROJECT_CLASSIC
 end
diff --git a/ItemRack/ItemRack.toc b/ItemRack/ItemRack.toc
index 12b3858..2f4936e 100644
--- a/ItemRack/ItemRack.toc
+++ b/ItemRack/ItemRack.toc
@@ -1,5 +1,5 @@
 ## Interface: 30403, 40400
-## Interface-Vanilla: 11500
+## Interface-Vanilla: 11504
 ## Interface-TBC: 20504
 ## Interface-Wrath: 30403
 ## Interface-Cata: 40400