diff --git a/lightningd/invoice.c b/lightningd/invoice.c
index 512edde95..cc7580a4f 100644
--- a/lightningd/invoice.c
+++ b/lightningd/invoice.c
@@ -1852,7 +1852,7 @@ static struct command_result *json_preapproveinvoice(struct command *cmd,
 
 	if (!param(cmd, buffer, params,
 		   /* FIXME: parameter should be invstring now */
-		   p_req("bolt11", param_string, &invstring),
+		   p_req("bolt11", param_invstring, &invstring),
 		   NULL))
 		return command_param_failed();
 
diff --git a/lightningd/pay.c b/lightningd/pay.c
index 0dd517317..e74d92533 100644
--- a/lightningd/pay.c
+++ b/lightningd/pay.c
@@ -1333,7 +1333,7 @@ static struct command_result *json_sendonion(struct command *cmd,
 		   p_opt("shared_secrets", param_secrets_array, &path_secrets),
 		   p_opt_def("partid", param_u64, &partid, 0),
 		   /* FIXME: parameter should be invstring now */
-		   p_opt("bolt11", param_string, &invstring),
+		   p_opt("bolt11", param_invstring, &invstring),
 		   p_opt_def("amount_msat|msatoshi", param_msat, &msat, AMOUNT_MSAT(0)),
 		   p_opt("destination", param_node_id, &destination),
 		   p_opt("localinvreqid", param_sha256, &local_invreq_id),
@@ -1711,7 +1711,7 @@ static struct command_result *json_listsendpays(struct command *cmd,
 
 	if (!param(cmd, buffer, params,
 		   /* FIXME: parameter should be invstring now */
-		   p_opt("bolt11", param_string, &invstring),
+		   p_opt("bolt11", param_invstring, &invstring),
 		   p_opt("payment_hash", param_sha256, &rhash),
 		   p_opt("status", param_payment_status, &status),
 		   NULL))
diff --git a/plugins/renepay/pay.c b/plugins/renepay/pay.c
index 27888cae4..ff1172144 100644
--- a/plugins/renepay/pay.c
+++ b/plugins/renepay/pay.c
@@ -625,7 +625,7 @@ static struct command_result *json_paystatus(struct command *cmd,
 	struct payment *p;
 
 	if (!param(cmd, buf, params,
-		   p_opt("invstring", param_string, &invstring),
+		   p_opt("invstring", param_invstring, &invstring),
 		   NULL))
 		return command_param_failed();
 
@@ -940,7 +940,7 @@ static struct command_result *json_pay(struct command *cmd,
 #endif
 
 	if (!param(cmd, buf, params,
-		   p_req("invstring", param_string, &invstr),
+		   p_req("invstring", param_invstring, &invstr),
  		   p_opt("amount_msat", param_msat, &msat),
  		   p_opt("maxfee", param_msat, &maxfee),
 
diff --git a/tests/test_pay.py b/tests/test_pay.py
index 7838dff25..b16a2d7b0 100644
--- a/tests/test_pay.py
+++ b/tests/test_pay.py
@@ -5382,7 +5382,6 @@ def test_strip_lightning_suffix_from_inv(node_factory):
     assert listpays[2]['bolt11'] == inv, f"list pays contains a different invoice, expected is {inv} but we get {listpays[0]['bolt11']}"
 
 
-@pytest.mark.xfail(strict=True)
 def test_listsendpays_crash(node_factory):
     l1 = node_factory.get_node()