diff --git a/IPython/parallel/apps/launcher.py b/IPython/parallel/apps/launcher.py
index 2efee30..fdfe63e 100644
--- a/IPython/parallel/apps/launcher.py
+++ b/IPython/parallel/apps/launcher.py
@@ -24,6 +24,7 @@ import logging
 import os
 import re
 import stat
+import time
 
 # signal imports, handling various platforms, versions