diff --git a/postal.lua b/postal.lua
index 9414cca..ba952a7 100644
--- a/postal.lua
+++ b/postal.lua
@@ -98,8 +98,8 @@ end
 function ADDON_LOADED()
 	if arg1 ~= 'postal' then return end
 
-	MailFrame.pushable = 1
-	FriendsFrame.pushable = 2
+	UIPanelWindows.MailFrame.pushable = 1
+	UIPanelWindows.FriendsFrame.pushable = 2
 
 	Inbox_Load()
 	SendMail_Load()
@@ -764,4 +764,4 @@ do
 			postalAutoCompleteBox:Hide()
 		end
 	end
-end
+end
\ No newline at end of file