diff --git a/IPython/terminal/ptutils.py b/IPython/terminal/ptutils.py
index 3cf3c11..3e5d3c5 100644
--- a/IPython/terminal/ptutils.py
+++ b/IPython/terminal/ptutils.py
@@ -9,6 +9,8 @@ not to be used outside IPython.
 
 import unicodedata
 from wcwidth import wcwidth
+import sys
+import traceback
 
 from IPython.core.completer import (
     provisionalcompleter, cursor_to_position,