diff --git a/gtk/gtkbox.c b/gtk/gtkbox.c
index c1e916aa6f..f4e88eb379 100644
--- a/gtk/gtkbox.c
+++ b/gtk/gtkbox.c
@@ -1794,6 +1794,8 @@ gtk_box_get_spacing (GtkBox *box)
  * and the baseline is not allocated by the parent then
  * @position is used to allocate the baseline wrt the
  * extra space available.
+ *
+ * Since: 3.10
  */
 void
 gtk_box_set_baseline_position (GtkBox             *box,
@@ -1822,6 +1824,8 @@ gtk_box_set_baseline_position (GtkBox             *box,
  * Gets the value set by gtk_box_set_baseline_position().
  *
  * Return value: the baseline position
+ *
+ * Since: 3.10
  **/
 GtkBaselinePosition
 gtk_box_get_baseline_position (GtkBox         *box)