diff --git a/Lib/idlelib/CallTips.py b/Lib/idlelib/CallTips.py
index 47a1d55..997eb13 100644
--- a/Lib/idlelib/CallTips.py
+++ b/Lib/idlelib/CallTips.py
@@ -127,7 +127,7 @@
     argText = ""
     if ob is not None:
         argOffset = 0
-        if type(ob)==types.ClassType:
+        if type(ob) in (types.ClassType, types.TypeType):
             # Look for the highest __init__ in the class chain.
             fob = _find_constructor(ob)
             if fob is None:
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index 4dc2505..5ea5b0e 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -3,6 +3,8 @@
 
 *Release date: XX-XXX-2006*
 
+- Tooltips failed on new-syle class __init__ args.  Bug 1027566 Loren Guthrie
+
 - Avoid occasional failure to detect closing paren properly.
   Patch 1407280 Tal Einat