diff --git a/gtk/gtkpopovermenu.c b/gtk/gtkpopovermenu.c
index 30b0dd4c53..f5d14f9b6e 100644
--- a/gtk/gtkpopovermenu.c
+++ b/gtk/gtkpopovermenu.c
@@ -63,7 +63,7 @@
  * `<link name="section">`, you can use `<submenu>` or `<section>`
  * elements.
  *
- * |[<!--language: xml -->
+ * |[<!-- language="xml" -->
  * <menu id='app-menu'>
  *   <section>
  *     <item>