diff --git a/platforms/nuttx/nuttx-configs/px4fmu-v5/nsh/defconfig b/platforms/nuttx/nuttx-configs/px4fmu-v5/nsh/defconfig
index 381f802082..af94144b57 100644
--- a/platforms/nuttx/nuttx-configs/px4fmu-v5/nsh/defconfig
+++ b/platforms/nuttx/nuttx-configs/px4fmu-v5/nsh/defconfig
@@ -174,7 +174,7 @@ CONFIG_UART4_RXDMA=y
 # CONFIG_USART6_RS485 is not set
 CONFIG_USART6_RXDMA=y
 # CONFIG_UART7_RS485 is not set
-CONFIG_UART7_RXDMA=y
+# CONFIG_UART7_RXDMA is not set
 # CONFIG_UART8_RS485 is not set
 CONFIG_UART8_RXDMA=y
 CONFIG_SERIAL_DISABLE_REORDERING=y
@@ -835,8 +835,8 @@ CONFIG_ARCH_HAVE_SERIAL_TERMIOS=y
 # CONFIG_USART3_SERIAL_CONSOLE is not set
 # CONFIG_UART4_SERIAL_CONSOLE is not set
 # CONFIG_USART6_SERIAL_CONSOLE is not set
-# CONFIG_UART7_SERIAL_CONSOLE is not set
-CONFIG_UART8_SERIAL_CONSOLE=y
+CONFIG_UART7_SERIAL_CONSOLE=y
+# CONFIG_UART8_SERIAL_CONSOLE is not set
 # CONFIG_OTHER_SERIAL_CONSOLE is not set
 # CONFIG_NO_SERIAL_CONSOLE is not set
 
diff --git a/src/drivers/boards/px4fmu-v5/board_config.h b/src/drivers/boards/px4fmu-v5/board_config.h
index eb229c3e39..b5b8d5b653 100644
--- a/src/drivers/boards/px4fmu-v5/board_config.h
+++ b/src/drivers/boards/px4fmu-v5/board_config.h
@@ -56,15 +56,15 @@
 /* PX4IO connection configuration */
 
 #define BOARD_USES_PX4IO_VERSION       2
-#define PX4IO_SERIAL_DEVICE     "/dev/ttyS5"
-#define PX4IO_SERIAL_TX_GPIO    GPIO_UART7_TX
-#define PX4IO_SERIAL_RX_GPIO    GPIO_UART7_RX
-#define PX4IO_SERIAL_BASE       STM32_UART7_BASE	/* hardwired on the board */
+#define PX4IO_SERIAL_DEVICE     "/dev/ttyS6"
+#define PX4IO_SERIAL_TX_GPIO    GPIO_UART8_TX
+#define PX4IO_SERIAL_RX_GPIO    GPIO_UART8_RX
+#define PX4IO_SERIAL_BASE       STM32_UART8_BASE	/* hardwired on the board */
 #define PX4IO_SERIAL_VECTOR     STM32_IRQ_UART7
-#define PX4IO_SERIAL_TX_DMAMAP  DMAMAP_UART7_TX
-#define PX4IO_SERIAL_RX_DMAMAP  DMAMAP_UART7_RX
+#define PX4IO_SERIAL_TX_DMAMAP  DMAMAP_UART8_TX
+#define PX4IO_SERIAL_RX_DMAMAP  DMAMAP_UART8_RX
 #define PX4IO_SERIAL_RCC_REG	STM32_RCC_APB1ENR
-#define PX4IO_SERIAL_RCC_EN	RCC_APB1ENR_UART7EN
+#define PX4IO_SERIAL_RCC_EN	RCC_APB1ENR_UART8EN
 #define PX4IO_SERIAL_CLOCK      STM32_PCLK1_FREQUENCY
 #define PX4IO_SERIAL_BITRATE    1500000			/* 1.5Mbps -> max rate for IO */