diff --git a/gtk/gtkmenutracker.h b/gtk/gtkmenutracker.h
index b6c06ae183..04641418b4 100644
--- a/gtk/gtkmenutracker.h
+++ b/gtk/gtkmenutracker.h
@@ -26,22 +26,22 @@
 
 typedef struct _GtkMenuTracker GtkMenuTracker;
 
-typedef void         (* GtkMenuTrackerInsertFunc)       (GtkMenuTrackerItem       *item,
-                                                         gint                      position,
-                                                         gpointer                  user_data);
+typedef void         (* GtkMenuTrackerInsertFunc)                       (GtkMenuTrackerItem       *item,
+                                                                         gint                      position,
+                                                                         gpointer                  user_data);
 
-typedef void         (* GtkMenuTrackerRemoveFunc)       (gint                      position,
-                                                         gpointer                  user_data);
+typedef void         (* GtkMenuTrackerRemoveFunc)                       (gint                      position,
+                                                                         gpointer                  user_data);
 
 
-GtkMenuTracker *        gtk_menu_tracker_new            (GtkActionObservable      *observer,
-                                                         GMenuModel               *model,
-                                                         gboolean                  with_separators,
-                                                         const gchar              *action_namespace,
-                                                         GtkMenuTrackerInsertFunc  insert_func,
-                                                         GtkMenuTrackerRemoveFunc  remove_func,
-                                                         gpointer                  user_data);
+GtkMenuTracker *        gtk_menu_tracker_new                            (GtkActionObservable      *observer,
+                                                                         GMenuModel               *model,
+                                                                         gboolean                  with_separators,
+                                                                         const gchar              *action_namespace,
+                                                                         GtkMenuTrackerInsertFunc  insert_func,
+                                                                         GtkMenuTrackerRemoveFunc  remove_func,
+                                                                         gpointer                  user_data);
 
-void                    gtk_menu_tracker_free           (GtkMenuTracker           *tracker);
+void                    gtk_menu_tracker_free                           (GtkMenuTracker           *tracker);
 
 #endif /* __GTK_MENU_TRACKER_H__ */