diff --git a/glnx-backport-autocleanups.h b/glnx-backport-autocleanups.h
index f2bc4836..271f5af9 100644
--- a/glnx-backport-autocleanups.h
+++ b/glnx-backport-autocleanups.h
@@ -88,6 +88,7 @@ G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(GVariantDict, g_variant_dict_clear)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GVariantType, g_variant_type_free)
 
 /* Add GObject-based types add needed. */
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(GCancellable, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GConverter, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GConverterOutputStream, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GDataInputStream, g_object_unref)