diff --git a/src/action/action.py b/src/action/action.py
index bea470b3957ab8390718bb8174f4f57313add146..418704685bd350d8c8648b64a1712a9aea24517e 100644
--- a/src/action/action.py
+++ b/src/action/action.py
@@ -55,5 +55,5 @@ class Action(object):
             pass
 
         if ok is False:
-            logging.error("Variable %s must be set in the manifest and equal to %s")
+            logging.error("Variable %s must be set in the manifest and equal to '%s'." % (name, value))
             sys.exit("Exiting")