--- a/services/sync/modules/service.js
+++ b/services/sync/modules/service.js
@@ -218,16 +218,17 @@ WeaveSvc.prototype = {
 
   get cancelRequested() this._cancelRequested,
   set cancelRequested(value) { this._cancelRequested = value; },
 
   get keyGenEnabled() this._keyGenEnabled,
   set keyGenEnabled(value) { this._keyGenEnabled = value; },
 
   get enabled() Svc.Prefs.get("enabled"),
+  set enabled(value) Svc.Prefs.set("enabled", value),
 
   get schedule() {
     if (!this.enabled)
       return 0; // manual/off
     return Svc.Prefs.get("schedule");
   },
 
   get locked() this._locked,