diff --git a/gst/gstprotection.c b/gst/gstprotection.c
index 9d25fb984a..c5223eeaa3 100644
--- a/gst/gstprotection.c
+++ b/gst/gstprotection.c
@@ -111,7 +111,7 @@ gst_protection_meta_get_info (void)
  *
  * Attaches protection metadata to a #GstBuffer.
  *
- * Returns: a pointer to the added #GstProtectionMeta if successful; %NULL if
+ * Returns: (transfer none): a pointer to the added #GstProtectionMeta if successful; %NULL if
  * unsuccessful.
  *
  * Since: 1.6