diff --git a/gtk/gtkgesture.c b/gtk/gtkgesture.c
index ab4f20b5b8..9da765426b 100644
--- a/gtk/gtkgesture.c
+++ b/gtk/gtkgesture.c
@@ -1240,7 +1240,7 @@ gtk_gesture_get_sequences (GtkGesture *gesture)
  *
  * Returns the #GdkEventSequence that was last updated on @gesture.
  *
- * Returns: The last updated sequence
+ * Returns: (nullable): The last updated sequence
  *
  * Since: 3.14
  **/
@@ -1263,7 +1263,7 @@ gtk_gesture_get_last_updated_sequence (GtkGesture *gesture)
  *
  * Returns the last event that was processed for @sequence.
  *
- * Returns: (transfer none): The last event from @sequence
+ * Returns: (transfer none) (nullable): The last event from @sequence
  **/
 const GdkEvent *
 gtk_gesture_get_last_event (GtkGesture       *gesture,
diff --git a/gtk/gtkgesturesingle.c b/gtk/gtkgesturesingle.c
index 065d55877e..5aa0978050 100644
--- a/gtk/gtkgesturesingle.c
+++ b/gtk/gtkgesturesingle.c
@@ -510,7 +510,7 @@ gtk_gesture_single_get_current_button (GtkGestureSingle *gesture)
  * Returns the event sequence currently interacting with @gesture.
  * This is only meaningful if gtk_gesture_is_active() returns %TRUE.
  *
- * Returns: the current sequence
+ * Returns: (nullable): the current sequence
  *
  * Since: 3.14
  **/