diff --git a/panels/region/cc-format-chooser.ui b/panels/region/cc-format-chooser.ui
index 0012936ea..db60a61ee 100644
--- a/panels/region/cc-format-chooser.ui
+++ b/panels/region/cc-format-chooser.ui
@@ -62,7 +62,7 @@
           <object class="AdwLeaflet" id="main_leaflet">
             <property name="hexpand">True</property>
             <property name="vexpand">True</property>
-            <signal name="notify::fold" handler="format_chooser_leaflet_fold_changed_cb" object="CcFormatChooser" swapped="yes"/>
+            <signal name="notify::folded" handler="format_chooser_leaflet_fold_changed_cb" object="CcFormatChooser" swapped="yes"/>
             <child>
               <object class="GtkBox" id="region_box">
                 <property name="vexpand">True</property>