diff --git a/libraries/AP_HAL_PX4/UARTDriver.cpp b/libraries/AP_HAL_PX4/UARTDriver.cpp
index 201a12bc5c..7f11703600 100644
--- a/libraries/AP_HAL_PX4/UARTDriver.cpp
+++ b/libraries/AP_HAL_PX4/UARTDriver.cpp
@@ -26,9 +26,9 @@ PX4UARTDriver::PX4UARTDriver(const char *devpath, const char *perf_name) :
 	_devpath(devpath),
     _fd(-1),
     _baudrate(57600),
-    _perf_uart(perf_alloc(PC_ELAPSED, perf_name)),
     _initialised(false),
     _in_timer(false),
+    _perf_uart(perf_alloc(PC_ELAPSED, perf_name)),
     _flow_control(FLOW_CONTROL_DISABLE)
 {
 }