diff --git a/src/calibre/gui2/preferences/look_feel.ui b/src/calibre/gui2/preferences/look_feel.ui
index 3b6bbb63ab..a9a664f2f3 100644
--- a/src/calibre/gui2/preferences/look_feel.ui
+++ b/src/calibre/gui2/preferences/look_feel.ui
@@ -177,7 +177,8 @@ if you never want subcategories</string>
      <item>
       <widget class="QSpinBox" name="opt_tags_browser_collapse_at">
        <property name="toolTip">
-        <string>If a Tag Browser category has more than this number of items, it is divided up into sub-categories. Set to zero to disable.</string>
+           <string>If a Tag Browser category has more than this number of items, it is divided
+               up into sub-categories. If the partition method is set to disable, this value is ignored.</string>
        </property>
        <property name="maximum">
         <number>10000</number>