diff --git a/src/xprt_quic.c b/src/xprt_quic.c
index 86c7ff84e..6b4563051 100644
--- a/src/xprt_quic.c
+++ b/src/xprt_quic.c
@@ -3551,8 +3551,10 @@ static int qc_send_version_negotiation(int fd, struct sockaddr_storage *addr,
 	 * header form
 	 * long header, fixed bit to 0 for Version Negotiation
 	 */
-	buf[i++] = '\x80';
+	if (RAND_bytes((unsigned char *)buf, 1) != 1)
+		return 1;
 
+	buf[i++] |= '\x80';
 	/* null version for Version Negotiation */
 	buf[i++] = '\x00';
 	buf[i++] = '\x00';