diff --git a/configs/olimex-lpc1766stk/zmodem/defconfig b/configs/olimex-lpc1766stk/zmodem/defconfig
index 6fabe918dfd..789ef197b4b 100644
--- a/configs/olimex-lpc1766stk/zmodem/defconfig
+++ b/configs/olimex-lpc1766stk/zmodem/defconfig
@@ -799,9 +799,8 @@ CONFIG_SYSTEM_ZMODEM_PKTBUFSIZE=1024
 CONFIG_SYSTEM_ZMODEM_SNDBUFSIZE=512
 CONFIG_SYSTEM_ZMODEM_MOUNTPOINT="/mnt/sdcard"
 # CONFIG_SYSTEM_ZMODEM_RCVSAMPLE is not set
-CONFIG_SYSTEM_ZMODEM_SENDATTN=y
+# CONFIG_SYSTEM_ZMODEM_SENDATTN is not set
 CONFIG_SYSTEM_ZMODEM_ALWAYSSINT=y
-# CONFIG_SYSTEM_ZMODEM_FULLSTREAMING is not set
 # CONFIG_SYSTEM_ZMODEM_SENDBRAK is not set
 CONFIG_SYSTEM_ZMODEM_RESPTIME=10
 CONFIG_SYSTEM_ZMODEM_SERIALNO=0