diff --git a/data/ui/window.ui b/data/ui/window.ui
index a7d92677..6c06078e 100644
--- a/data/ui/window.ui
+++ b/data/ui/window.ui
@@ -275,7 +275,7 @@
             <property name="visible">True</property>
             <property name="can_focus">True</property>
             <property name="receives_default">True</property>
-            <property name="tooltip_text" translatable="yes">Search for events</property>
+            <property name="tooltip_text" translatable="yes" context="tooltip">Search for events</property>
             <child>
               <object class="GtkImage" id="search_button_image">
                 <property name="visible">True</property>