diff --git a/src/hardware/openbench-logic-sniffer/api.c b/src/hardware/openbench-logic-sniffer/api.c
index 4f9ee04f..e25a8612 100644
--- a/src/hardware/openbench-logic-sniffer/api.c
+++ b/src/hardware/openbench-logic-sniffer/api.c
@@ -131,6 +131,9 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 		sr_err("Could not use port %s. Quitting.", conn);
 		return NULL;
 	}
+
+	serial_flush( serial );
+
 	send_shortcommand(serial, CMD_ID);
 
 	g_usleep(RESPONSE_DELAY_US);