diff --git a/css/ext6-pmg.css b/css/ext6-pmg.css
index 68b008b..b9d916f 100644
--- a/css/ext6-pmg.css
+++ b/css/ext6-pmg.css
@@ -138,7 +138,7 @@ table:not(.x-grid-item-selected) tr.x-grid-row.disabled {
     color: #000;
 }
 
-.x-treelist-nav {
+.x-treelist-pve-nav {
     background-color: #f5f5f5;
     border-right: 1px solid #cfcfcf;
 }
diff --git a/js/ConfigPanel.js b/js/ConfigPanel.js
index c7148cb..f6aaaad 100644
--- a/js/ConfigPanel.js
+++ b/js/ConfigPanel.js
@@ -58,7 +58,7 @@ Ext.define('PMG.panel.Config', {
 	items: {
 	    xtype: 'treelist',
 	    itemId: 'menu',
-	    ui: 'nav',
+	    ui: 'pve-nav',
 	    expanderOnly: true,
 	    expanderFirst: false,
 	    animation: false,
diff --git a/js/MainView.js b/js/MainView.js
index 01b9658..9ebd065 100644
--- a/js/MainView.js
+++ b/js/MainView.js
@@ -233,7 +233,7 @@ Ext.define('PMG.MainView', {
 		},
 	    }, {
 		xtype: 'box',
-		cls: 'x-treelist-nav',
+		cls: 'x-treelist-pve-nav',
 		flex: 1,
 	    }],
 	},
diff --git a/js/NavigationTree.js b/js/NavigationTree.js
index 63f8e94..2c4d5a5 100644
--- a/js/NavigationTree.js
+++ b/js/NavigationTree.js
@@ -224,5 +224,5 @@ Ext.define('PMG.view.main.NavigationTree', {
     expanderOnly: true,
     expanderFirst: false,
     store: 'NavigationStore',
-    ui: 'nav',
+    ui: 'pve-nav',
 });