diff --git a/src/gui/gcal-calendar-button.ui b/src/gui/gcal-calendar-button.ui
index 104d7752..85a58540 100644
--- a/src/gui/gcal-calendar-button.ui
+++ b/src/gui/gcal-calendar-button.ui
@@ -3,7 +3,7 @@
   <template class="GcalCalendarButton" parent="AdwBin">
     <child>
       <object class="GtkMenuButton">
-        <property name="tooltip_text" translatable="yes">Manage Calendars</property>
+        <property name="tooltip-text" translatable="yes">Manage Calendars</property>
         <property name="use-underline">True</property>
         <property name="label" translatable="yes">_Calendars</property>
         <property name="popover">popover</property>
diff --git a/src/gui/gcal-toolbar-end.ui b/src/gui/gcal-toolbar-end.ui
index 94a46d9d..d2fa3a0a 100644
--- a/src/gui/gcal-toolbar-end.ui
+++ b/src/gui/gcal-toolbar-end.ui
@@ -6,14 +6,14 @@
         <property name="spacing">6</property>
         <child>
           <object class="GcalSearchButton" id="search_button">
-            <property name="tooltip_text" translatable="yes" context="tooltip">Search</property>
+            <property name="tooltip-text" translatable="yes" context="tooltip">Search</property>
           </object>
         </child>
         <child>
           <object class="GtkButton">
             <property name="icon-name">list-add-symbolic</property>
             <property name="action-name">win.new-event</property>
-            <property name="tooltip_text" translatable="yes" context="tooltip">Add Event</property>
+            <property name="tooltip-text" translatable="yes" context="tooltip">Add Event</property>
           </object>
         </child>
       </object>