diff --git a/gtk/gtkapplicationwindow.h b/gtk/gtkapplicationwindow.h
index 66c392944e..4210a18773 100644
--- a/gtk/gtkapplicationwindow.h
+++ b/gtk/gtkapplicationwindow.h
@@ -62,7 +62,7 @@ GType       gtk_application_window_get_type          (void) G_GNUC_CONST;
 GtkWidget * gtk_application_window_new               (GtkApplication      *application);
 
 void        gtk_application_window_set_show_menubar (GtkApplicationWindow *window,
-                                                     gboolean              show);
+                                                     gboolean              show_menubar);
 gboolean    gtk_application_window_get_show_menubar (GtkApplicationWindow *window);
 
 G_END_DECLS