diff --git a/example-clients/simple_client.c b/example-clients/simple_client.c
index 517f3eb8..27376918 100644
--- a/example-clients/simple_client.c
+++ b/example-clients/simple_client.c
@@ -117,9 +117,9 @@ process (jack_nframes_t nframes, void *arg)
     }
 
 	memset(msg_send, 0, Q_MSG_SIZE);
-	sprintf (msg_send, "%x", (sys_time.tv_sec*1000000000ULL + sys_time.tv_nsec));
+	sprintf (msg_send, "%llx", (sys_time.tv_sec*1000000000ULL + sys_time.tv_nsec));
 
-	if (mq_send(tsq, msg_send, Q_MSG_SIZE, NULL) < 0) {
+	if (mq_send(tsq, msg_send, Q_MSG_SIZE, 0) < 0) {
 		fprintf(filepointer, "send error %d %s %s\n", errno, strerror(errno), msg_send);fflush(filepointer);
 	}