diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index fc160ffaea..5a46c1a0e3 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,3 +1,8 @@
+####
+# DO NOT EDIT THIS FILE IN MASTER.  ONLY EDIT IT IN THE OLDEST SUPPORTED
+# BRANCH, THEN MERGE FORWARD.
+####
+
 # This file controls how gitlab validates Tor commits and merge requests.
 #
 # It is primarily based on a set of scripts and configurations by
diff --git a/scripts/ci/ci-driver.sh b/scripts/ci/ci-driver.sh
index 50728a137e..bede68baa8 100755
--- a/scripts/ci/ci-driver.sh
+++ b/scripts/ci/ci-driver.sh
@@ -1,5 +1,10 @@
 #!/bin/bash
 
+####
+# DO NOT EDIT THIS FILE IN MASTER.  ONLY EDIT IT IN THE OLDEST SUPPORTED
+# BRANCH, THEN MERGE FORWARD.
+####
+
 # This script is used to build Tor for continuous integration.  It should
 # be kept the same for all supported Tor versions.
 #