diff --git a/libraries/AP_HAL_Linux/HAL_Linux_Class.cpp b/libraries/AP_HAL_Linux/HAL_Linux_Class.cpp
index 6618e83bc3..e264ccbdb1 100644
--- a/libraries/AP_HAL_Linux/HAL_Linux_Class.cpp
+++ b/libraries/AP_HAL_Linux/HAL_Linux_Class.cpp
@@ -248,9 +248,9 @@ static CANIface* canDrivers[HAL_NUM_CAN_IFACES];
 HAL_Linux::HAL_Linux() :
     AP_HAL::HAL(
         &uartADriver,
-        &uartBDriver,
-        &uartCDriver,
+        &uartCDriver, // ordering captures the historical use of uartB as SERIAL3
         &uartDDriver,
+        &uartBDriver,
         &uartEDriver,
         &uartFDriver,
         &uartGDriver,