diff --git a/scripts/checkTrackSelection.py b/scripts/checkTrackSelection.py
index 59b4b45..fb4890f 100644
--- a/scripts/checkTrackSelection.py
+++ b/scripts/checkTrackSelection.py
@@ -3,7 +3,7 @@
 # @Author: Elena Graverini
 # @Date:   2015-10-27 18:26:49
 # @Last Modified by:   Elena Graverini
-# @Last Modified time: 2017-05-03 15:25:35
+# @Last Modified time: 2017-05-03 15:27:44
 
 import ROOT as r
 import os
@@ -99,6 +99,7 @@
     line.SetLineWidth(3)
     line.SetLineColor(r.kRed)
     line.SetLineStyle(7)
+    c.Update()
     line.DrawLine(float(cut[det]), 0.0, float(cut[det]), r.gPad.GetUymax())
     c.Modified()
     c.Update()