diff --git a/ui/composer-headerbar.ui b/ui/composer-headerbar.ui
index 2e2501d0..13db768a 100644
--- a/ui/composer-headerbar.ui
+++ b/ui/composer-headerbar.ui
@@ -58,7 +58,7 @@
       <object class="GtkButton">
         <property name="visible">True</property>
         <property name="can_focus">True</property>
-        <property name="label">Cancel</property>
+        <property name="label" translatable="yes">Cancel</property>
         <property name="action_name">cmh.composer-close</property>
       </object>
     </child>