diff --git a/include/uapi/linux/btf.h b/include/uapi/linux/btf.h
index ec1798b..266d4ff 100644
--- a/include/uapi/linux/btf.h
+++ b/include/uapi/linux/btf.h
@@ -36,7 +36,8 @@ struct btf_type {
 	 * bits 24-28: kind (e.g. int, ptr, array...etc)
 	 * bits 29-30: unused
 	 * bit     31: kind_flag, currently used by
-	 *             struct, union, enum, fwd and enum64
+	 *             struct, union, enum, fwd, enum64,
+	 *             decl_tag and type_tag
 	 */
 	__u32 info;
 	/* "size" is used by INT, ENUM, STRUCT, UNION, DATASEC and ENUM64.