diff --git a/common/bolt12.c b/common/bolt12.c
index b845031f1..7c812bd56 100644
--- a/common/bolt12.c
+++ b/common/bolt12.c
@@ -214,7 +214,7 @@ struct tlv_offer *offer_decode(const tal_t *ctx,
 
 	/* BOLT-offers #12:
 	 *
-	 * - if offer_amount is set and offer_description is not set:
+	 * - if `offer_amount` is set and `offer_description` is not set:
 	 *    - MUST NOT respond to the offer.
 	 */
 	if (!offer->offer_description && offer->offer_amount) {
@@ -288,7 +288,7 @@ struct tlv_invoice_request *invrequest_decode(const tal_t *ctx,
 	/* BOLT-offers #12:
 	 * The reader:
 	 *...
-	 *  - MUST fail the request if any non-signature TLV fields outside the inclusive ranges: 0 to 159 and 1000000000 to 2999999999
+	 *  - MUST fail the request if any non-signature TLV fields are outside the inclusive ranges: 0 to 159 and 1000000000 to 2999999999
 	 */
 	badf = any_field_outside_range(invrequest->fields, true,
 				       0, 159,
diff --git a/devtools/bolt12-cli.c b/devtools/bolt12-cli.c
index 49f093700..c8d607b5c 100644
--- a/devtools/bolt12-cli.c
+++ b/devtools/bolt12-cli.c
@@ -104,9 +104,12 @@ static bool print_offer_amount(const struct bitcoin_blkid *chains,
 	 *     - MUST specify `offer_currency` `iso4217` as an ISO 4712 three-letter code.
 	 *     - MUST specify `offer_amount` in the currency unit adjusted by the ISO 4712
 	 *       exponent (e.g. USD cents).
+	 *   - MUST set `offer_description` to a complete description of the purpose
+	 *       of the payment.
 	 * - otherwise:
 	 *   - MUST NOT set `offer_amount`
 	 *   - MUST NOT set `offer_currency`
+	 *   - MAY set `offer_description`
 	 */
 	if (!iso4217) {
 		if (tal_count(chains) == 0)
diff --git a/plugins/offers_offer.c b/plugins/offers_offer.c
index 2cdd875d3..e036b483e 100644
--- a/plugins/offers_offer.c
+++ b/plugins/offers_offer.c
@@ -529,7 +529,7 @@ struct command_result *json_offer(struct command *cmd,
 
 	/* BOLT-offers #12:
 	 *
-	 * - if offer_amount is set and offer_description is not set:
+	 * - if `offer_amount` is set and `offer_description` is not set:
 	 *    - MUST NOT respond to the offer.
 	 */
 	if (!offer->offer_description && offer->offer_amount)