diff --git a/lib/roles/device.js b/lib/roles/device.js
index 08044eff..6c8c718b 100644
--- a/lib/roles/device.js
+++ b/lib/roles/device.js
@@ -93,7 +93,7 @@ module.exports = function(options) {
 
   // Error in vital utility
   vitals.on('error', function(name, err) {
-    log.fatal(util.format('Vital utility "%s" had an error', er))
+    log.fatal(util.format('Vital utility "%s" had an error', err.stack))
     selfDestruct()
   })