diff --git a/mie/include/mie/id.h b/mie/include/mie/id.h
index 76cc7a5..4f59bf7 100644
--- a/mie/include/mie/id.h
+++ b/mie/include/mie/id.h
@@ -86,6 +86,18 @@ static inline void mie_id_builder_add_cstr(
 {
 	mie_id_builder_add(builder, s, strlen(s));
 }
+static inline void mie_id_builder_add_id(
+	struct mie_id_builder *builder, const mie_id *id)
+{
+	mie_id_builder_add(builder, id->id_bytes, sizeof id->id_bytes);
+}
+static inline void mie_id_builder_add_int(
+	struct mie_id_builder *builder, long long v)
+{
+	char s[32];
+	size_t len = snprintf(s, sizeof s, "%lld", v);
+	mie_id_builder_add(builder, s, len);
+}
 MIE_API void mie_id_builder_add_rope(
 	struct mie_id_builder *builder, const b_rope *rope);
 MIE_API void mie_id_builder_add_marker(