diff --git a/src/connection.c b/src/connection.c
index 06e1ed8..c0da874 100644
--- a/src/connection.c
+++ b/src/connection.c
@@ -996,6 +996,7 @@
 	return 0;
 }
 
+/* Note: <remote> is explicitly allowed to be NULL */
 int make_proxy_line(char *buf, int buf_len, struct server *srv, struct connection *remote)
 {
 	int ret = 0;
@@ -1107,6 +1108,7 @@
 	return length + sizeof(*tlv);
 }
 
+/* Note: <remote> is explicitly allowed to be NULL */
 int make_proxy_line_v2(char *buf, int buf_len, struct server *srv, struct connection *remote)
 {
 	const char pp2_signature[] = PP2_SIGNATURE;
@@ -1191,7 +1193,7 @@
 		ret += make_tlv(&buf[ret], (buf_len - ret), PP2_TYPE_CRC32C, sizeof(zero_crc32c), (const char *)&zero_crc32c);
 	}
 
-	if (conn_get_alpn(remote, &value, &value_len)) {
+	if (remote && conn_get_alpn(remote, &value, &value_len)) {
 		if ((buf_len - ret) < sizeof(struct tlv))
 			return 0;
 		ret += make_tlv(&buf[ret], (buf_len - ret), PP2_TYPE_ALPN, value_len, value);