diff --git a/isisd/isis_tlvs.c b/isisd/isis_tlvs.c
index 45abc38db7..128ecc16b0 100644
--- a/isisd/isis_tlvs.c
+++ b/isisd/isis_tlvs.c
@@ -1971,6 +1971,18 @@ static int pack_items_(uint16_t mtid, enum isis_tlv_context context,
 		       struct list *new_fragment_arg);
 #define pack_items(...) pack_items_(ISIS_MT_IPV4_UNICAST, __VA_ARGS__)
 
+/* Functions related to Sub-Sub-TLVs in general */
+
+struct isis_subsubtlvs *isis_alloc_subsubtlvs(enum isis_tlv_context context)
+{
+	struct isis_subsubtlvs *result;
+
+	result = XCALLOC(MTYPE_ISIS_SUBSUBTLV, sizeof(*result));
+	result->context = context;
+
+	return result;
+}
+
 /* Functions related to subtlvs */
 
 static struct isis_subtlvs *isis_alloc_subtlvs(enum isis_tlv_context context)
diff --git a/isisd/isis_tlvs.h b/isisd/isis_tlvs.h
index 501d2c4511..7f4440d376 100644
--- a/isisd/isis_tlvs.h
+++ b/isisd/isis_tlvs.h
@@ -693,6 +693,7 @@ int isis_pack_tlvs(struct isis_tlvs *tlvs, struct stream *stream,
 		   size_t len_pointer, bool pad, bool is_lsp);
 void isis_free_tlvs(struct isis_tlvs *tlvs);
 struct isis_tlvs *isis_alloc_tlvs(void);
+struct isis_subsubtlvs *isis_alloc_subsubtlvs(enum isis_tlv_context context);
 int isis_unpack_tlvs(size_t avail_len, struct stream *stream,
 		     struct isis_tlvs **dest, const char **error_log);
 const char *isis_format_tlvs(struct isis_tlvs *tlvs, struct json_object *json);