diff --git a/lightning/src/ln/blinded_payment_tests.rs b/lightning/src/ln/blinded_payment_tests.rs
index 2a1ae8f00c0..192d021201b 100644
--- a/lightning/src/ln/blinded_payment_tests.rs
+++ b/lightning/src/ln/blinded_payment_tests.rs
@@ -1313,7 +1313,7 @@ fn custom_tlvs_to_blinded_path() {
 			htlc_minimum_msat: chan_upd.htlc_minimum_msat,
 		},
 		payment_context: PaymentContext::unknown(),
-		custom_tlvs: Vec::new(),
+		custom_tlvs: vec![43, 43]
 	};
 	let mut secp_ctx = Secp256k1::new();
 	let blinded_path = BlindedPaymentPath::new(
@@ -1327,6 +1327,7 @@ fn custom_tlvs_to_blinded_path() {
 	);
 
 	let recipient_onion_fields = RecipientOnionFields::spontaneous_empty()
+		.with_user_custom_tlvs(vec![43, 43])
 		.with_sender_custom_tlvs(vec![((1 << 16) + 3, vec![42, 42])])
 		.unwrap();
 	nodes[0].node.send_payment(payment_hash, recipient_onion_fields.clone(),
@@ -1340,10 +1341,12 @@ fn custom_tlvs_to_blinded_path() {
 	let path = &[&nodes[1]];
 	let args = PassAlongPathArgs::new(&nodes[0], path, amt_msat, payment_hash, ev)
 		.with_payment_secret(payment_secret)
+		.with_user_custom_tlvs(recipient_onion_fields.user_custom_tlvs.clone())
 		.with_sender_custom_tlvs(recipient_onion_fields.sender_custom_tlvs.clone());
 	do_pass_along_path(args);
 	claim_payment_along_route(
 		ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1]]], payment_preimage)
+			.with_user_custom_tlvs(recipient_onion_fields.user_custom_tlvs.clone())
 			.with_sender_custom_tlvs(recipient_onion_fields.sender_custom_tlvs.clone())
 	);
 }
diff --git a/lightning/src/ln/functional_test_utils.rs b/lightning/src/ln/functional_test_utils.rs
index 5a8b22d2543..23d90bb8448 100644
--- a/lightning/src/ln/functional_test_utils.rs
+++ b/lightning/src/ln/functional_test_utils.rs
@@ -2828,6 +2828,10 @@ impl<'a, 'b, 'c, 'd> ClaimAlongRouteArgs<'a, 'b, 'c, 'd> {
 		self.allow_1_msat_fee_overpay = true;
 		self
 	}
+	pub fn with_user_custom_tlvs(mut self, custom_tlvs: Vec<u8>) -> Self {
+		self.user_custom_tlvs = custom_tlvs;
+		self
+	}
 	pub fn with_sender_custom_tlvs(mut self, custom_tlvs: Vec<(u64, Vec<u8>)>) -> Self {
 		self.sender_custom_tlvs = custom_tlvs;
 		self
diff --git a/lightning/src/ln/outbound_payment.rs b/lightning/src/ln/outbound_payment.rs
index 46a45356d55..265b0ca52f9 100644
--- a/lightning/src/ln/outbound_payment.rs
+++ b/lightning/src/ln/outbound_payment.rs
@@ -659,6 +659,11 @@ impl RecipientOnionFields {
 		Ok(self)
 	}
 
+	pub fn with_user_custom_tlvs(mut self, custom_tlvs: Vec<u8>) -> Self {
+		self.user_custom_tlvs = custom_tlvs;
+		self
+	}
+
 	/// Gets the custom TLVs that will be sent or have been received.
 	///
 	/// Custom TLVs allow sending extra application-specific data with a payment. They provide
diff --git a/lightning/src/ln/payment_tests.rs b/lightning/src/ln/payment_tests.rs
index 0f60a0fbd4c..60511edc852 100644
--- a/lightning/src/ln/payment_tests.rs
+++ b/lightning/src/ln/payment_tests.rs
@@ -3787,8 +3787,12 @@ fn test_retry_custom_tlvs() {
 	let mut route_params = route.route_params.clone().unwrap();
 
 	let sender_custom_tlvs = vec![((1 << 16) + 3, vec![0x42u8; 16])];
+	let user_custom_tlvs = vec![0x43u8; 16];
 	let onion_fields = RecipientOnionFields::secret_only(payment_secret);
-	let onion_fields = onion_fields.with_sender_custom_tlvs(sender_custom_tlvs.clone()).unwrap();
+	let onion_fields = onion_fields
+		.with_user_custom_tlvs(user_custom_tlvs.clone())
+		.with_sender_custom_tlvs(sender_custom_tlvs.clone())
+		.unwrap();
 
 	nodes[0].router.expect_find_route(route_params.clone(), Ok(route.clone()));
 	nodes[0].node.send_payment(payment_hash, onion_fields,
@@ -3840,10 +3844,12 @@ fn test_retry_custom_tlvs() {
 	let path = &[&nodes[1], &nodes[2]];
 	let args = PassAlongPathArgs::new(&nodes[0], path, 1_000_000, payment_hash, events.pop().unwrap())
 		.with_payment_secret(payment_secret)
+		.with_user_custom_tlvs(user_custom_tlvs.clone())
 		.with_sender_custom_tlvs(sender_custom_tlvs.clone());
 	do_pass_along_path(args);
 	claim_payment_along_route(
 		ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1], &nodes[2]]], payment_preimage)
+			.with_user_custom_tlvs(user_custom_tlvs)
 			.with_sender_custom_tlvs(sender_custom_tlvs)
 	);
 }