diff --git a/channeld/channel_wire.csv b/channeld/channel_wire.csv
index 3d48549bd..751284704 100644
--- a/channeld/channel_wire.csv
+++ b/channeld/channel_wire.csv
@@ -96,7 +96,7 @@ channel_fail_htlc,,id,u64
 # If this is non-zero length, you need to wrap this and pass it on.
 channel_fail_htlc,,len,u16
 channel_fail_htlc,,error_pkt,len*u8
-# If it errcode is != 0, it's a local error, otherwise we're passing thru.
+# If it errcode is != 0, it's a local error, otherwise we're passing through.
 channel_fail_htlc,,errcode,u16
 # If errcode & UPDATE, this says which outgoing channel failed.
 channel_fail_htlc,,which_channel,struct short_channel_id
diff --git a/tools/check-bolt.c b/tools/check-bolt.c
index 176f4da6d..fd5c7e5ea 100644
--- a/tools/check-bolt.c
+++ b/tools/check-bolt.c
@@ -160,7 +160,7 @@ static char *code_to_regex(const char *code, size_t len, bool escape)
 				after_nl = false;
 				continue;
 			}
-			/* Fall thru. */
+			/* Fall through. */
 		case '.':
 		case '$':
 		case '^':
@@ -172,7 +172,7 @@ static char *code_to_regex(const char *code, size_t len, bool escape)
 		case '|':
 			if (escape)
 				*(p++) = '\\';
-			/* Fall thru */
+			/* Fall through */
 		default:
 			*(p++) = code[i];
 		}
diff --git a/wire/test/run-peer-wire.c b/wire/test/run-peer-wire.c
index c07c34b74..f926160b2 100644
--- a/wire/test/run-peer-wire.c
+++ b/wire/test/run-peer-wire.c
@@ -47,11 +47,11 @@ static void set_pubkey(struct pubkey *key)
 #define with_field(p, field)				\
 	(upto_field((p), field) + sizeof((p)->field))
 
-/* Equal upto this field */
+/* Equal up to this field */
 #define eq_upto(p1, p2, field)			\
 	(memcmp((p1), (p2), upto_field(p1, field)) == 0)
 
-/* Equal upto and including this field */
+/* Equal up to and including this field */
 #define eq_with(p1, p2, field)			\
 	(memcmp((p1), (p2), with_field(p1, field)) == 0)