diff --git a/gui/utils/colorUtils.py b/gui/utils/colorUtils.py
index 8ce98803a..ce56531a9 100644
--- a/gui/utils/colorUtils.py
+++ b/gui/utils/colorUtils.py
@@ -1,4 +1,5 @@
 import wx
+import math
 
 #Brightens a color (wx.Colour), factor = [0,1]