diff --git a/direct/src/tkwidgets/Valuator.py b/direct/src/tkwidgets/Valuator.py
index 1704948571..4bc57c7896 100644
--- a/direct/src/tkwidgets/Valuator.py
+++ b/direct/src/tkwidgets/Valuator.py
@@ -8,6 +8,7 @@ from . import WidgetPropertiesDialog
 import Pmw
 from direct.directtools.DirectUtil import getTkColorString
 from panda3d.core import Vec4
+import sys
 
 if sys.version_info >= (3, 0):
     from tkinter.colorchooser import askcolor