diff --git a/libraries/AP_HAL_ChibiOS/CANFDIface.cpp b/libraries/AP_HAL_ChibiOS/CANFDIface.cpp
index 4d57effbc9..4d258e1c46 100644
--- a/libraries/AP_HAL_ChibiOS/CANFDIface.cpp
+++ b/libraries/AP_HAL_ChibiOS/CANFDIface.cpp
@@ -167,9 +167,9 @@ static inline void handleCANInterrupt(uint8_t phys_index, uint8_t line_index)
 uint32_t CANIface::FDCANMessageRAMOffset_ = 0;
 
 CANIface::CANIface(uint8_t index) :
-    self_index_(index),
     rx_bytebuffer_((uint8_t*)rx_buffer, sizeof(rx_buffer)),
-    rx_queue_(&rx_bytebuffer_)
+    rx_queue_(&rx_bytebuffer_),
+    self_index_(index)
 {
     if (index >= HAL_NUM_CAN_IFACES) {
          AP_HAL::panic("Bad CANIface index.");
diff --git a/libraries/AP_HAL_ChibiOS/CanIface.cpp b/libraries/AP_HAL_ChibiOS/CanIface.cpp
index 172e412b0e..90badc4158 100644
--- a/libraries/AP_HAL_ChibiOS/CanIface.cpp
+++ b/libraries/AP_HAL_ChibiOS/CanIface.cpp
@@ -140,9 +140,9 @@ const uint32_t CANIface::TSR_ABRQx[CANIface::NumTxMailboxes] = {
 
 
 CANIface::CANIface(uint8_t index) :
-    self_index_(index),
     rx_bytebuffer_((uint8_t*)rx_buffer, sizeof(rx_buffer)),
-    rx_queue_(&rx_bytebuffer_)
+    rx_queue_(&rx_bytebuffer_),
+    self_index_(index)
 {
     if (index >= HAL_NUM_CAN_IFACES) {
         AP_HAL::panic("Bad CANIface index.");
diff --git a/libraries/AP_HAL_ChibiOS/I2CDevice.cpp b/libraries/AP_HAL_ChibiOS/I2CDevice.cpp
index 6a9514df9f..12bead827b 100644
--- a/libraries/AP_HAL_ChibiOS/I2CDevice.cpp
+++ b/libraries/AP_HAL_ChibiOS/I2CDevice.cpp
@@ -261,11 +261,11 @@ I2CDeviceManager::I2CDeviceManager(void)
 }
 
 I2CDevice::I2CDevice(uint8_t busnum, uint8_t address, uint32_t bus_clock, bool use_smbus, uint32_t timeout_ms) :
+    bus(I2CDeviceManager::businfo[busnum]),
     _retries(2),
     _address(address),
     _use_smbus(use_smbus),
-    _timeout_ms(timeout_ms),
-    bus(I2CDeviceManager::businfo[busnum])
+    _timeout_ms(timeout_ms)
 {
     set_device_bus(busnum+HAL_I2C_BUS_BASE);
     set_device_address(address);
diff --git a/libraries/AP_HAL_ChibiOS/UARTDriver.cpp b/libraries/AP_HAL_ChibiOS/UARTDriver.cpp
index 87c511163e..6b769b7f1e 100644
--- a/libraries/AP_HAL_ChibiOS/UARTDriver.cpp
+++ b/libraries/AP_HAL_ChibiOS/UARTDriver.cpp
@@ -103,8 +103,8 @@ static const eventmask_t EVT_TRANSMIT_UNBUFFERED = EVENT_MASK(3);
 #endif
 
 UARTDriver::UARTDriver(uint8_t _serial_num) :
-serial_num(_serial_num),
 sdef(_serial_tab[_serial_num]),
+serial_num(_serial_num),
 _baudrate(57600)
 {
     osalDbgAssert(serial_num < UART_MAX_DRIVERS, "too many SERIALn drivers");