diff --git a/clutter/clutter-actor-box.c b/clutter/clutter-actor-box.c
index 538917660..3f3179dbd 100644
--- a/clutter/clutter-actor-box.c
+++ b/clutter/clutter-actor-box.c
@@ -455,7 +455,7 @@ clutter_actor_box_clamp_to_pixel (ClutterActorBox *box)
 
 /**
  * clutter_actor_box_union:
- * @a: (in) the first #ClutterActorBox
+ * @a: (in): the first #ClutterActorBox
  * @b: (in): the second #ClutterActorBox
  * @result: (out): the #ClutterActorBox representing a union
  *   of @a and @b
diff --git a/clutter/clutter-actor.c b/clutter/clutter-actor.c
index df26b3926..49439995f 100644
--- a/clutter/clutter-actor.c
+++ b/clutter/clutter-actor.c
@@ -15521,7 +15521,7 @@ clutter_actor_create_pango_context (ClutterActor *self)
 /**
  * clutter_actor_create_pango_layout:
  * @self: a #ClutterActor
- * @text: (allow-none) the text to set on the #PangoLayout, or %NULL
+ * @text: (allow-none): the text to set on the #PangoLayout, or %NULL
  *
  * Creates a new #PangoLayout from the same #PangoContext used
  * by the #ClutterActor. The #PangoLayout is already configured