diff --git a/lightningd/htlc_end.c b/lightningd/htlc_end.c
index de2c138de..38a40e7f2 100644
--- a/lightningd/htlc_end.c
+++ b/lightningd/htlc_end.c
@@ -152,7 +152,7 @@ struct htlc_out *htlc_out_check(const struct htlc_out *hout,
 				       " less than %"PRIu64,
 				       hout->in->msatoshi, hout->msatoshi);
 		if (hout->in->cltv_expiry <= hout->cltv_expiry)
-			return corrupt(abortstr, "Input ctlv_expiry %u"
+			return corrupt(abortstr, "Input cltv_expiry %u"
 				       " less than %u",
 				       hout->in->cltv_expiry, hout->cltv_expiry);
 		if (!sha256_eq(&hout->in->payment_hash, &hout->payment_hash))
diff --git a/lightningd/options.c b/lightningd/options.c
index 6edc57845..e66600a9e 100644
--- a/lightningd/options.c
+++ b/lightningd/options.c
@@ -316,10 +316,10 @@ static void config_register_opts(struct lightningd *ld)
 			 "Percentage of fee to request for their commitment");
 	opt_register_arg("--cltv-delta", opt_set_u32, opt_show_u32,
 			 &ld->config.cltv_expiry_delta,
-			 "Number of blocks for ctlv_expiry_delta");
+			 "Number of blocks for cltv_expiry_delta");
 	opt_register_arg("--cltv-final", opt_set_u32, opt_show_u32,
 			 &ld->config.cltv_final,
-			 "Number of blocks for final ctlv_expiry");
+			 "Number of blocks for final cltv_expiry");
 	opt_register_arg("--commit-time=<millseconds>",
 			 opt_set_u32, opt_show_u32,
 			 &ld->config.commit_time_ms,
diff --git a/tests/test_misc.py b/tests/test_misc.py
index 627b63daf..9c1371b3e 100644
--- a/tests/test_misc.py
+++ b/tests/test_misc.py
@@ -291,7 +291,7 @@ def test_htlc_in_timeout(node_factory, bitcoind, executor):
     # l1 will disconnect and not reconnect.
     l1.daemon.wait_for_log('dev_disconnect: -WIRE_REVOKE_AND_ACK')
 
-    # Deadline HTLC expiry minus 1/2 cltv-expiry delta (rounded up) (== cltv - 3).  ctlv is 5+1.
+    # Deadline HTLC expiry minus 1/2 cltv-expiry delta (rounded up) (== cltv - 3).  cltv is 5+1.
     bitcoind.generate_block(2)
     assert not l2.daemon.is_in_log('hit deadline')
     bitcoind.generate_block(1)
diff --git a/tools/check-spelling.sh b/tools/check-spelling.sh
index e32ce5734..a9f88697e 100755
--- a/tools/check-spelling.sh
+++ b/tools/check-spelling.sh
@@ -5,3 +5,8 @@ if git --no-pager grep -nHiE 'l[ightn]{6}g|l[ightn]{8}g|ilghtning|lgihtning|lihg
     echo "Is this warning incorrect? Please teach tools/check-spelling.sh about the exciting new word."
     exit 1
 fi
+
+if git --no-pager grep -nHiE 'ctlv' -- . ':!tools/check-spelling.sh'; then
+    echo "It's check lock time verify, not check time lock verify!" >&2
+    exit 1
+fi