diff --git a/tools/scripts/failure-event-handler b/tools/scripts/failure-event-handler
index 7f4c43bd8d..0be887f951 100755
--- a/tools/scripts/failure-event-handler
+++ b/tools/scripts/failure-event-handler
@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 import sys
 import os
+import signal
 
 def write_stdout(s):
     sys.stdout.write(s)