diff --git a/lib/sources/librelinkup.js b/lib/sources/librelinkup.js
index 49eb7c2..6d79baa 100644
--- a/lib/sources/librelinkup.js
+++ b/lib/sources/librelinkup.js
@@ -121,6 +121,7 @@ function linkUpSource (opts, axios) {
       var { status, data, ticket } = payload;
       var batch = data;
       // TODO: TRANSFORM
+      var last_updated = (last_known && last_known.entries) ? last_known.entries : null;
       function is_newer (elem) {
         if (!last_known) { return true; };
         return last_known.entries < new Date(elem.dateString);