diff --git a/install_minimal/upgrades/airtime-1.9.0/media-monitor-upgrade.py b/install_minimal/upgrades/airtime-1.9.0/media-monitor-upgrade.py
index 02a49b731..b384df721 100644
--- a/install_minimal/upgrades/airtime-1.9.0/media-monitor-upgrade.py
+++ b/install_minimal/upgrades/airtime-1.9.0/media-monitor-upgrade.py
@@ -10,6 +10,7 @@ import ConfigParser
 import pwd
 import grp
 import subprocess
+import re
 
 import os.path