diff --git a/mobile/android/chrome/content/downloads.js b/mobile/android/chrome/content/downloads.js
index bc821f69996..3ef33d1a142 100644
--- a/mobile/android/chrome/content/downloads.js
+++ b/mobile/android/chrome/content/downloads.js
@@ -262,9 +262,9 @@ AlertDownloadProgressListener.prototype = {
       case Ci.nsIDownloadManager.DOWNLOAD_FINISHED: {
         Downloads.removeNotification(aDownload);
         if (aDownload.isPrivate) {
-          let index = this._privateDownloads.indexOf(aDownload);
+          let index = Downloads._privateDownloads.indexOf(aDownload);
           if (index != -1) {
-            this._privateDownloads.splice(index, 1);
+            Downloads._privateDownloads.splice(index, 1);
           }
         }