diff --git a/services/document-updater/app/coffee/ProjectFlusher.coffee b/services/document-updater/app/coffee/ProjectFlusher.coffee
index cd23cc6f74..ce93b0e2f1 100644
--- a/services/document-updater/app/coffee/ProjectFlusher.coffee
+++ b/services/document-updater/app/coffee/ProjectFlusher.coffee
@@ -6,6 +6,7 @@ docUpdaterKeys = Settings.redis.documentupdater.key_schema
 async = require("async")
 ProjectManager = require("./ProjectManager")
 _ = require("lodash")
+logger = require("logger-sharelatex")
 
 ProjectFlusher =