diff --git a/boards/px4/fmu-v5/nuttx-config/nsh/defconfig b/boards/px4/fmu-v5/nuttx-config/nsh/defconfig
index b27d4da0fa..70e1a1a083 100644
--- a/boards/px4/fmu-v5/nuttx-config/nsh/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/nsh/defconfig
@@ -215,7 +215,7 @@ CONFIG_UART8_BAUD=57600
 CONFIG_UART8_RXBUFSIZE=600
 CONFIG_UART8_RXDMA=y
 CONFIG_UART8_TXBUFSIZE=1500
-CONFIG_UART8_TXDMA=y
+#CONFIG_UART8_TXDMA=y
 CONFIG_USART1_BAUD=57600
 CONFIG_USART1_RXBUFSIZE=600
 CONFIG_USART1_TXBUFSIZE=1500