--- a/toolkit/mozapps/extensions/internal/XPIProvider.jsm
+++ b/toolkit/mozapps/extensions/internal/XPIProvider.jsm
@@ -1329,16 +1329,17 @@ class XPIState {
  */
 class XPIStateLocation extends Map {
   constructor(name, path, saved = {}) {
     super();
 
     this.name = name;
     this.path = path || saved.path || null;
     this.staged = saved.staged || {};
+    this.changed = saved.changed || false;
     this.dir = this.path && new nsIFile(this.path);
 
     for (let [id, data] of Object.entries(saved.addons || {})) {
       let xpiState = this._addState(id, data);
       // Make a note that this state was restored from saved data.
       xpiState.wasRestored = true;
     }
   }