diff --git a/docs/reference/gtk/gtk4-sections.txt b/docs/reference/gtk/gtk4-sections.txt
index 4a75a1fab0..76d8566d4f 100644
--- a/docs/reference/gtk/gtk4-sections.txt
+++ b/docs/reference/gtk/gtk4-sections.txt
@@ -1536,6 +1536,7 @@ GtkFilter
 gtk_filter_match
 gtk_filter_get_strictness
 <SUBSECTION>
+GtkFilterChange
 gtk_filter_changed
 <SUBSECTION>
 gtk_custom_filter_new
diff --git a/gtk/gtkfilter.h b/gtk/gtkfilter.h
index e9c24684cb..fcd1c7b02c 100644
--- a/gtk/gtkfilter.h
+++ b/gtk/gtkfilter.h
@@ -105,14 +105,14 @@ struct _GtkFilterClass
 };
 
 GDK_AVAILABLE_IN_ALL
-gboolean                gtk_filter_match                        (GtkFilter              *filter,
+gboolean                gtk_filter_match                        (GtkFilter              *self,
                                                                  gpointer                item);
 GDK_AVAILABLE_IN_ALL
-GtkFilterMatch          gtk_filter_get_strictness               (GtkFilter              *filter);
+GtkFilterMatch          gtk_filter_get_strictness               (GtkFilter              *self);
 
 /* for filter implementations */
 GDK_AVAILABLE_IN_ALL
-void                    gtk_filter_changed                      (GtkFilter              *filter,
+void                    gtk_filter_changed                      (GtkFilter              *self,
                                                                  GtkFilterChange         change);