diff --git a/boards/px4/fmu-v5/nuttx-config/critmonitor/defconfig b/boards/px4/fmu-v5/nuttx-config/critmonitor/defconfig
index 58e249e59d..b66408a823 100644
--- a/boards/px4/fmu-v5/nuttx-config/critmonitor/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/critmonitor/defconfig
@@ -234,6 +234,7 @@ CONFIG_USART3_OFLOWCONTROL=y
 CONFIG_USART3_RXBUFSIZE=600
 CONFIG_USART3_RXDMA=y
 CONFIG_USART3_TXBUFSIZE=3000
+CONFIG_USART3_TXDMA=y
 CONFIG_USART6_BAUD=57600
 CONFIG_USART6_RXBUFSIZE=600
 CONFIG_USART6_RXDMA=y
diff --git a/boards/px4/fmu-v5/nuttx-config/debug/defconfig b/boards/px4/fmu-v5/nuttx-config/debug/defconfig
index 673458f750..f0651bba15 100644
--- a/boards/px4/fmu-v5/nuttx-config/debug/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/debug/defconfig
@@ -276,6 +276,7 @@ CONFIG_USART3_OFLOWCONTROL=y
 CONFIG_USART3_RXBUFSIZE=600
 CONFIG_USART3_RXDMA=y
 CONFIG_USART3_TXBUFSIZE=3000
+CONFIG_USART3_TXDMA=y
 CONFIG_USART6_BAUD=57600
 CONFIG_USART6_RXBUFSIZE=600
 CONFIG_USART6_RXDMA=y
diff --git a/boards/px4/fmu-v5/nuttx-config/irqmonitor/defconfig b/boards/px4/fmu-v5/nuttx-config/irqmonitor/defconfig
index 38d60bf5da..88297173bb 100644
--- a/boards/px4/fmu-v5/nuttx-config/irqmonitor/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/irqmonitor/defconfig
@@ -233,6 +233,7 @@ CONFIG_USART3_OFLOWCONTROL=y
 CONFIG_USART3_RXBUFSIZE=600
 CONFIG_USART3_RXDMA=y
 CONFIG_USART3_TXBUFSIZE=3000
+CONFIG_USART3_TXDMA=y
 CONFIG_USART6_BAUD=57600
 CONFIG_USART6_RXBUFSIZE=600
 CONFIG_USART6_RXDMA=y
diff --git a/boards/px4/fmu-v5/nuttx-config/nsh/defconfig b/boards/px4/fmu-v5/nuttx-config/nsh/defconfig
index eb042c9fa8..92a58f7c16 100644
--- a/boards/px4/fmu-v5/nuttx-config/nsh/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/nsh/defconfig
@@ -233,6 +233,7 @@ CONFIG_USART3_OFLOWCONTROL=y
 CONFIG_USART3_RXBUFSIZE=600
 CONFIG_USART3_RXDMA=y
 CONFIG_USART3_TXBUFSIZE=3000
+CONFIG_USART3_TXDMA=y
 CONFIG_USART6_BAUD=57600
 CONFIG_USART6_RXBUFSIZE=600
 CONFIG_USART6_RXDMA=y
diff --git a/boards/px4/fmu-v5/nuttx-config/optimized/defconfig b/boards/px4/fmu-v5/nuttx-config/optimized/defconfig
index 94263656dd..ef2ca6a152 100644
--- a/boards/px4/fmu-v5/nuttx-config/optimized/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/optimized/defconfig
@@ -233,6 +233,7 @@ CONFIG_USART3_OFLOWCONTROL=y
 CONFIG_USART3_RXBUFSIZE=600
 CONFIG_USART3_RXDMA=y
 CONFIG_USART3_TXBUFSIZE=3000
+CONFIG_USART3_TXDMA=y
 CONFIG_USART6_BAUD=57600
 CONFIG_USART6_RXBUFSIZE=600
 CONFIG_USART6_RXDMA=y
diff --git a/boards/px4/fmu-v5/nuttx-config/stackcheck/defconfig b/boards/px4/fmu-v5/nuttx-config/stackcheck/defconfig
index b7efb1bec8..43b513ab8b 100644
--- a/boards/px4/fmu-v5/nuttx-config/stackcheck/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/stackcheck/defconfig
@@ -233,6 +233,7 @@ CONFIG_USART3_OFLOWCONTROL=y
 CONFIG_USART3_RXBUFSIZE=600
 CONFIG_USART3_RXDMA=y
 CONFIG_USART3_TXBUFSIZE=3000
+CONFIG_USART3_TXDMA=y
 CONFIG_USART6_BAUD=57600
 CONFIG_USART6_RXBUFSIZE=600
 CONFIG_USART6_RXDMA=y
diff --git a/boards/px4/fmu-v5x/nuttx-config/base_phy_DP83848C/defconfig b/boards/px4/fmu-v5x/nuttx-config/base_phy_DP83848C/defconfig
index 8828b08645..7fbc8c80b0 100644
--- a/boards/px4/fmu-v5x/nuttx-config/base_phy_DP83848C/defconfig
+++ b/boards/px4/fmu-v5x/nuttx-config/base_phy_DP83848C/defconfig
@@ -250,6 +250,7 @@ CONFIG_UART5_OFLOWCONTROL=y
 CONFIG_UART5_RXBUFSIZE=600
 CONFIG_UART5_RXDMA=y
 CONFIG_UART5_TXBUFSIZE=3000
+CONFIG_UART5_TXDMA=y
 CONFIG_UART7_BAUD=57600
 CONFIG_UART7_IFLOWCONTROL=y
 CONFIG_UART7_OFLOWCONTROL=y
diff --git a/boards/px4/fmu-v5x/nuttx-config/nsh/defconfig b/boards/px4/fmu-v5x/nuttx-config/nsh/defconfig
index 996d87327b..4a2cd53a3d 100644
--- a/boards/px4/fmu-v5x/nuttx-config/nsh/defconfig
+++ b/boards/px4/fmu-v5x/nuttx-config/nsh/defconfig
@@ -251,6 +251,7 @@ CONFIG_UART5_OFLOWCONTROL=y
 CONFIG_UART5_RXBUFSIZE=600
 CONFIG_UART5_RXDMA=y
 CONFIG_UART5_TXBUFSIZE=3000
+CONFIG_UART5_TXDMA=y
 CONFIG_UART7_BAUD=57600
 CONFIG_UART7_IFLOWCONTROL=y
 CONFIG_UART7_OFLOWCONTROL=y