diff --git a/etc/taskcluster/docker/base.dockerfile b/etc/taskcluster/docker/base.dockerfile
index 90459eaa664..65e8b074c71 100644
--- a/etc/taskcluster/docker/base.dockerfile
+++ b/etc/taskcluster/docker/base.dockerfile
@@ -1,3 +1,5 @@
+# Dummy comment to force an image rebuild for https://github.com/servo/servo/issues/27758
+
 FROM ubuntu:eoan-20200608
 
 ENV \