diff --git a/modules/xpbar.lua b/modules/xpbar.lua
index 3be59403..2b0403fe 100644
--- a/modules/xpbar.lua
+++ b/modules/xpbar.lua
@@ -15,11 +15,16 @@ pfUI:RegisterModule("xpbar", function ()
   pfUI.xp:RegisterEvent("PLAYER_ENTERING_WORLD")
 
   pfUI.xp:SetScript("OnEvent", function()
-    if event == "PLAYER_ENTERING_WORLD" or event == "PLAYER_LEVEL_UP" then
+    if event == "PLAYER_ENTERING_WORLD" then
       pfUI.xp.starttime = GetTime()
       pfUI.xp.startxp = UnitXP("player")
     end
 
+    if event == "PLAYER_LEVEL_UP" then
+      -- add previously gained experience to the session
+      pfUI.xp.startxp = pfUI.xp.startxp - UnitXPMax("player")
+    end
+
     if UnitXPMax("player") ~= 0 then
       pfUI.xp.bar:SetMinMaxValues(0, UnitXPMax("player"))
       pfUI.xp.bar:SetValue(UnitXP("player"))