diff --git a/debian/changelog b/debian/changelog
index 12d1bd5d..1109d5ae 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,7 +1,7 @@
 livecd-rootfs (2.208.18) UNRELEASED; urgency=medium
 
   * Preserve ubuntu-advantage-tools' apt preferences against live-build's
-    attempt to delete them.
+    attempt to delete them. (LP: #1855354)
 
  -- Michael Hudson-Doyle <michael.hudson@ubuntu.com>  Fri, 06 Dec 2019 10:23:03 +1300