diff --git a/common/modules/addons.jsm b/common/modules/addons.jsm
index f6df9a67..1bfed0ab 100644
--- a/common/modules/addons.jsm
+++ b/common/modules/addons.jsm
@@ -258,7 +258,7 @@ var AddonList = Class("AddonList", {
         this.modules = modules;
         this.filter = filter && filter.toLowerCase();
         this.nodes = {};
-        this.addons = [];
+        this.addons = {};
         this.ready = false;
 
         AddonManager.getAddonsByTypes(types, this.closure(function (addons) {