diff --git a/lib/ngtcp2_conn.c b/lib/ngtcp2_conn.c
index b70f7af1829ed0dd06e164a5c2db9b5d004ccd7b..045f91015a3a347666c3b7434e589536acd01a98 100644
--- a/lib/ngtcp2_conn.c
+++ b/lib/ngtcp2_conn.c
@@ -3980,7 +3980,7 @@ static ssize_t conn_recv_pkt(ngtcp2_conn *conn, const ngtcp2_path *path,
 
 /*
  * conn_recv_handshake_pkt processes received packet |pkt| whose
- * length if |pktlen| during handshake period.  The buffer pointed by
+ * length is |pktlen| during handshake period.  The buffer pointed by
  * |pkt| might contain multiple packets.  This function only processes
  * one packet.
  *