diff --git a/IPython/terminal/ptutils.py b/IPython/terminal/ptutils.py
index 7679b4a..c390d49 100644
--- a/IPython/terminal/ptutils.py
+++ b/IPython/terminal/ptutils.py
@@ -21,6 +21,7 @@ from prompt_toolkit.patch_stdout import patch_stdout
 import pygments.lexers as pygments_lexers
 import os
 import sys
+import traceback
 
 _completion_sentinel = object()