diff --git a/Lib/idlelib/ColorDelegator.py b/Lib/idlelib/ColorDelegator.py
index 70a933aa3be..22bb22f82bc 100644
--- a/Lib/idlelib/ColorDelegator.py
+++ b/Lib/idlelib/ColorDelegator.py
@@ -39,7 +39,6 @@ class ColorDelegator(Delegator):
         Delegator.__init__(self)
         self.prog = prog
         self.idprog = idprog
-        self.asprog = asprog
         self.LoadTagDefs()
 
     def setdelegate(self, delegate):