--- a/services/sync/modules/constants.js
+++ b/services/sync/modules/constants.js
@@ -38,16 +38,18 @@
 let EXPORTED_SYMBOLS = [((this[key] = val), key) for ([key, val] in Iterator({
 
 WEAVE_VERSION:                         "@weave_version@",
 
 // Last client version this client can read. If the server contains an older
 // version, this client will wipe the data on the server first.
 COMPATIBLE_VERSION:                    "@compatible_version@",
 
+DEFAULT_SERVER:                        "@server_url@",
+
 PREFS_BRANCH:                          "extensions.weave.",
 
 // Host "key" to access Weave Identity in the password manager
 PWDMGR_HOST:                           "chrome://weave",
 
 // File IO Flags
 MODE_RDONLY:                           0x01,
 MODE_WRONLY:                           0x02,