diff --git a/lib/roles/provider.js b/lib/roles/provider.js
index e6335286..91ca3a5d 100644
--- a/lib/roles/provider.js
+++ b/lib/roles/provider.js
@@ -168,8 +168,11 @@ module.exports = function(options) {
       }
 
       function errorListener(err) {
-        log.error('Device worker "%s" had an error: %s',
-          device.id, err.message)
+        log.error(
+          'Device worker "%s" had an error: %s'
+        , device.id
+        , err.message
+        )
       }
 
       function exitListener(code, signal) {