diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index b1c9bea8bd..6486b18da5 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -12343,7 +12343,7 @@ gtk_widget_class_add_action (GtkWidgetClass  *widget_class,
  * @widget_class: a #GtkWidgetClass
  * @action_name: a prefixed action name, such as "clipboard.paste"
  * @parameter_type: (nullable): the parameter type, or %NULL
- * @activate: callback to use when the action is activated
+ * @activate: (scope call): callback to use when the action is activated
  *
  * This should be called at class initialization time to specify
  * actions to be added for all instances of this class.