diff --git a/panels/system/datetime/cc-datetime-page.ui b/panels/system/datetime/cc-datetime-page.ui
index dce48c574..3dda4974b 100644
--- a/panels/system/datetime/cc-datetime-page.ui
+++ b/panels/system/datetime/cc-datetime-page.ui
@@ -266,6 +266,7 @@
                 <child>
                   <object class="AdwActionRow">
                     <property name="title" translatable="yes">Week _Numbers</property>
+                    <property name="subtitle" translatable="yes">Shown in the dropdown calendar</property>
                     <property name="use_underline">True</property>
                     <property name="activatable_widget">week_numbers_switch</property>
                     <child>