diff --git a/gtk/gtkappchooserbutton.h b/gtk/gtkappchooserbutton.h
index 0ea5416d57..61a88b11ce 100644
--- a/gtk/gtkappchooserbutton.h
+++ b/gtk/gtkappchooserbutton.h
@@ -42,9 +42,6 @@ typedef struct _GtkAppChooserButton        GtkAppChooserButton;
 typedef struct _GtkAppChooserButtonClass   GtkAppChooserButtonClass;
 typedef struct _GtkAppChooserButtonPrivate GtkAppChooserButtonPrivate;
 
-typedef void (* GtkAppChooserButtonItemFunc) (GtkAppChooserButton *self,
-                                              gpointer             user_data);
-
 struct _GtkAppChooserButton {
   GtkComboBox parent;