diff --git a/glib/gasyncqueue.c b/glib/gasyncqueue.c
index c824751af..0518763a6 100644
--- a/glib/gasyncqueue.c
+++ b/glib/gasyncqueue.c
@@ -281,9 +281,11 @@ g_async_queue_unlock (GAsyncQueue *queue)
 /**
  * g_async_queue_push:
  * @queue: a #GAsyncQueue
- * @data: @data to push into the @queue
+ * @data: (not nullable): data to push onto the @queue
  *
- * Pushes the @data into the @queue. @data must not be %NULL.
+ * Pushes the @data into the @queue.
+ *
+ * The @data parameter must not be %NULL.
  */
 void
 g_async_queue_push (GAsyncQueue *queue,
@@ -300,9 +302,11 @@ g_async_queue_push (GAsyncQueue *queue,
 /**
  * g_async_queue_push_unlocked:
  * @queue: a #GAsyncQueue
- * @data: @data to push into the @queue
+ * @data: (not nullable): data to push onto the @queue
  *
- * Pushes the @data into the @queue. @data must not be %NULL.
+ * Pushes the @data into the @queue.
+ *
+ * The @data parameter must not be %NULL.
  *
  * This function must be called while holding the @queue's lock.
  */
@@ -321,7 +325,7 @@ g_async_queue_push_unlocked (GAsyncQueue *queue,
 /**
  * g_async_queue_push_sorted:
  * @queue: a #GAsyncQueue
- * @data: the @data to push into the @queue
+ * @data: (not nullable): the @data to push into the @queue
  * @func: the #GCompareDataFunc is used to sort @queue
  * @user_data: user data passed to @func.
  *
@@ -362,7 +366,7 @@ g_async_queue_invert_compare (gpointer  v1,
 /**
  * g_async_queue_push_sorted_unlocked:
  * @queue: a #GAsyncQueue
- * @data: the @data to push into the @queue
+ * @data: the data to push into the @queue
  * @func: the #GCompareDataFunc is used to sort @queue
  * @user_data: user data passed to @func.
  *
@@ -485,7 +489,7 @@ g_async_queue_pop_unlocked (GAsyncQueue *queue)
  * %NULL is returned.
  *
  * Returns: (nullable): data from the queue or %NULL, when no data is
- *     available immediately.
+ *   available immediately.
  */
 gpointer
 g_async_queue_try_pop (GAsyncQueue *queue)
@@ -511,7 +515,7 @@ g_async_queue_try_pop (GAsyncQueue *queue)
  * This function must be called while holding the @queue's lock.
  *
  * Returns: (nullable): data from the queue or %NULL, when no data is
- *     available immediately.
+ *   available immediately.
  */
 gpointer
 g_async_queue_try_pop_unlocked (GAsyncQueue *queue)
@@ -532,7 +536,7 @@ g_async_queue_try_pop_unlocked (GAsyncQueue *queue)
  * If no data is received before the timeout, %NULL is returned.
  *
  * Returns: (nullable): data from the queue or %NULL, when no data is
- *     received before the timeout.
+ *   received before the timeout.
  */
 gpointer
 g_async_queue_timeout_pop (GAsyncQueue *queue,
@@ -563,7 +567,7 @@ g_async_queue_timeout_pop (GAsyncQueue *queue,
  * This function must be called while holding the @queue's lock.
  *
  * Returns: (nullable): data from the queue or %NULL, when no data is
- *     received before the timeout.
+ *   received before the timeout.
  */
 gpointer
 g_async_queue_timeout_pop_unlocked (GAsyncQueue *queue,
@@ -590,7 +594,7 @@ g_async_queue_timeout_pop_unlocked (GAsyncQueue *queue,
  * and g_time_val_add() can be used.
  *
  * Returns: (nullable): data from the queue or %NULL, when no data is
- *     received before @end_time.
+ *   received before @end_time.
  *
  * Deprecated: use g_async_queue_timeout_pop().
  */
@@ -636,7 +640,7 @@ G_GNUC_END_IGNORE_DEPRECATIONS
  * This function must be called while holding the @queue's lock.
  *
  * Returns: (nullable): data from the queue or %NULL, when no data is
- *     received before @end_time.
+ *   received before @end_time.
  *
  * Deprecated: use g_async_queue_timeout_pop_unlocked().
  */
@@ -798,7 +802,7 @@ g_async_queue_sort_unlocked (GAsyncQueue      *queue,
 /**
  * g_async_queue_remove:
  * @queue: a #GAsyncQueue
- * @item: the data to remove from the @queue
+ * @item: (not nullable): the data to remove from the @queue
  *
  * Remove an item from the queue.
  *
@@ -848,7 +852,7 @@ g_async_queue_remove_unlocked (GAsyncQueue *queue,
 /**
  * g_async_queue_push_front:
  * @queue: a #GAsyncQueue
- * @item: data to push into the @queue
+ * @item: (not nullable): data to push into the @queue
  *
  * Pushes the @item into the @queue. @item must not be %NULL.
  * In contrast to g_async_queue_push(), this function
@@ -872,7 +876,7 @@ g_async_queue_push_front (GAsyncQueue *queue,
 /**
  * g_async_queue_push_front_unlocked:
  * @queue: a #GAsyncQueue
- * @item: data to push into the @queue
+ * @item: (not nullable): data to push into the @queue
  *
  * Pushes the @item into the @queue. @item must not be %NULL.
  * In contrast to g_async_queue_push_unlocked(), this function