--- a/services/sync/modules/addonsreconciler.js
+++ b/services/sync/modules/addonsreconciler.js
@@ -440,16 +440,17 @@ AddonsReconciler.prototype = {
       this._addons[id] = record;
       this._log.debug("Adding change because add-on not present locally: " +
                       id);
       this._addChange(now, CHANGE_INSTALLED, record);
       return;
     }
 
     let record = this._addons[id];
+    record.isSyncable = addon.isSyncable;
 
     if (!record.installed) {
       // It is possible the record is marked as uninstalled because an
       // uninstall is pending.
       if (!(addon.pendingOperations & AddonManager.PENDING_UNINSTALL)) {
         record.installed = true;
         record.modified = now;
       }