diff --git a/gnome-shell-extensions.changes b/gnome-shell-extensions.changes
index a9dedfe..5f4e9f7 100644
--- a/gnome-shell-extensions.changes
+++ b/gnome-shell-extensions.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Mon Sep 18 06:38:10 UTC 2017 - xwang@suse.com
+
+- Update patch gse-sle-classic-ext.patch.
+  Fix 'this._pureWinList is null', error involved in bsc#1046570
+  fix(bsc#1046570).
+
 -------------------------------------------------------------------
 Wed Sep 13 02:57:16 UTC 2017 - xwang@suse.com
 
diff --git a/gse-sle-classic-ext.patch b/gse-sle-classic-ext.patch
index 0feaf83..36cec35 100644
--- a/gse-sle-classic-ext.patch
+++ b/gse-sle-classic-ext.patch
@@ -838,7 +838,7 @@ Index: gnome-shell-extensions-3.26.0/extensions/window-list/extension.js
      },
  
      enable: function() {
-@@ -1301,6 +1392,71 @@ const Extension = new Lang.Class({
+@@ -1301,6 +1392,73 @@ const Extension = new Lang.Class({
      }
  });
  
@@ -880,6 +880,7 @@ Index: gnome-shell-extensions-3.26.0/extensions/window-list/extension.js
 +        // No need for `showOnAllMonitors` change either even this option
 +        // changes.
 +
++        this._heightChangeId =
 +        Main.panel.actor.connect('notify::height', Lang.bind(this, function() {
 +            Main.layoutManager.panelBox.set_position(this._pureWinList._monitor.x,
 +                this._pureWinList._monitor.y + this._pureWinList._monitor.height - Main.panel.actor.height);
@@ -890,6 +891,7 @@ Index: gnome-shell-extensions-3.26.0/extensions/window-list/extension.js
 +        if (!this._pureWinList)
 +            return;
 +
++        Main.panel.actor.disconnect(this._heightChangeId);
 +        this._pureWinList.actor.hide();
 +        this._pureWinList.actor.destroy();
 +