diff --git a/nuttx-configs/px4fmu-v1/nsh/defconfig b/nuttx-configs/px4fmu-v1/nsh/defconfig
index 5b91930c91..ae941804ec 100644
--- a/nuttx-configs/px4fmu-v1/nsh/defconfig
+++ b/nuttx-configs/px4fmu-v1/nsh/defconfig
@@ -268,7 +268,7 @@ CONFIG_USART2_RXDMA=y
 # CONFIG_USART3_RXDMA is not set
 # CONFIG_UART4_RXDMA is not set
 # CONFIG_UART5_RS485 is not set
-CONFIG_UART5_RXDMA=y
+CONFIG_UART5_RXDMA=n
 # CONFIG_USART6_RS485 is not set
 CONFIG_USART6_RXDMA=y
 # CONFIG_USART7_RXDMA is not set