diff --git a/Source/Modules/WindowControllers/CtlPrefWindow.swift b/Source/Modules/WindowControllers/CtlPrefWindow.swift
index ee859c3e..39400f83 100644
--- a/Source/Modules/WindowControllers/CtlPrefWindow.swift
+++ b/Source/Modules/WindowControllers/CtlPrefWindow.swift
@@ -519,6 +519,7 @@ extension CtlPrefWindow: NSToolbarDelegate {
     item.target = self
     item.image = tab.icon
     item.label = tab.i18nTitle
+    item.toolTip = tab.i18nTitle
     item.tag = tab.cocoaTag
     item.action = #selector(updateTab(_:))
     return item