diff --git a/gdk/gdkcontentproviderimpl.c b/gdk/gdkcontentproviderimpl.c
index b59ccc01a8..ed5e3e8450 100644
--- a/gdk/gdkcontentproviderimpl.c
+++ b/gdk/gdkcontentproviderimpl.c
@@ -390,7 +390,7 @@ gdk_content_provider_union_init (GdkContentProviderUnion *self)
 
 /**
  * gdk_content_provider_new_union:
- * @providers: (nullable) (array length=n_providers) [transfer elements]:
+ * @providers: (nullable) (array length=n_providers) (transfer full):
  *     The #GdkContentProviders to present the union of
  * @n_providers: the number of providers
  *