diff --git a/mozilla/client.mk b/mozilla/client.mk
index 295d11cc84d..47d4604de0b 100644
--- a/mozilla/client.mk
+++ b/mozilla/client.mk
@@ -52,7 +52,7 @@
 #
 # For branches, uncomment the MOZ_CO_TAG line with the proper tag,
 # and commit this file on that tag.
-#MOZ_CO_TAG = <tag>
+MOZ_CO_TAG = SSU_20030812_BRANCH
 NSPR_CO_TAG = NSPRPUB_PRE_4_2_CLIENT_BRANCH
 PSM_CO_TAG = #We will now build PSM from the tip instead of a branch.
 NSS_CO_TAG = NSS_CLIENT_TAG