diff --git a/nuttx-configs/tap-v1/nsh/defconfig b/nuttx-configs/tap-v1/nsh/defconfig
index 1716a3c722..cd5cd6b9be 100644
--- a/nuttx-configs/tap-v1/nsh/defconfig
+++ b/nuttx-configs/tap-v1/nsh/defconfig
@@ -882,8 +882,8 @@ CONFIG_USART6_SERIALDRIVER=y
 CONFIG_MCU_SERIAL=y
 CONFIG_STANDARD_SERIAL=y
 CONFIG_SERIAL_NPOLLWAITERS=2
-# CONFIG_SERIAL_IFLOWCONTROL is not set
-# CONFIG_SERIAL_OFLOWCONTROL is not set
+CONFIG_SERIAL_IFLOWCONTROL=y
+CONFIG_SERIAL_OFLOWCONTROL=y
 # CONFIG_SERIAL_DMA is not set
 CONFIG_ARCH_HAVE_SERIAL_TERMIOS=y
 # CONFIG_USART1_SERIAL_CONSOLE is not set