diff --git a/arc/settings/settings.py b/arc/settings/settings.py
index 64183f7bac..03154cc9ee 100644
--- a/arc/settings/settings.py
+++ b/arc/settings/settings.py
@@ -9,6 +9,7 @@
 import string
 import sys
 import shutil
+import re
 
 # Users should update the following server dictionary.
 # Instructions for RSA key generation can be found here: