diff --git a/gtk/gtksettings.c b/gtk/gtksettings.c
index 3144afa849..706d3171ac 100644
--- a/gtk/gtksettings.c
+++ b/gtk/gtksettings.c
@@ -2231,6 +2231,12 @@ _gtk_rc_property_parser_from_type (GType type)
     return NULL;
 }
 
+/**
+ * gtk_settings_install_property:
+ * @pspec:
+ *
+ * Deprecated: 3.16: This function is not useful outside GTK+.
+ */
 void
 gtk_settings_install_property (GParamSpec *pspec)
 {
@@ -2252,6 +2258,8 @@ gtk_settings_install_property (GParamSpec *pspec)
  * gtk_settings_install_property_parser:
  * @pspec:
  * @parser: (scope call):
+ *
+ * Deprecated: 3.16: This function is not useful outside GTK+.
  */
 void
 gtk_settings_install_property_parser (GParamSpec          *pspec,
diff --git a/gtk/gtksettings.h b/gtk/gtksettings.h
index 4ff91bde7e..95fe638937 100644
--- a/gtk/gtksettings.h
+++ b/gtk/gtksettings.h
@@ -92,9 +92,9 @@ GtkSettings*    gtk_settings_get_default             (void);
 GDK_AVAILABLE_IN_ALL
 GtkSettings*    gtk_settings_get_for_screen          (GdkScreen *screen);
 
-GDK_AVAILABLE_IN_ALL
+GDK_DEPRECATED_IN_3_16
 void            gtk_settings_install_property        (GParamSpec         *pspec);
-GDK_AVAILABLE_IN_ALL
+GDK_DEPRECATED_IN_3_16
 void            gtk_settings_install_property_parser (GParamSpec         *pspec,
                                                       GtkRcPropertyParser parser);