diff --git a/libraries/AP_InertialSensor/AP_InertialSensor_MPU6000.cpp b/libraries/AP_InertialSensor/AP_InertialSensor_MPU6000.cpp
index 6242c7ccdd..3042dc98a6 100644
--- a/libraries/AP_InertialSensor/AP_InertialSensor_MPU6000.cpp
+++ b/libraries/AP_InertialSensor/AP_InertialSensor_MPU6000.cpp
@@ -200,7 +200,7 @@ static int16_t spi_transfer_16(void)
 	return (((int16_t)byte_H)<<8) | byte_L;
 }
 
-void AP_InertialSensor_MPU6000::read()
+void AP_InertialSensor_MPU6000::read(uint32_t )
 {
   // We start a multibyte SPI read of sensors
   byte addr = MPUREG_ACCEL_XOUT_H | 0x80;      // Set most significant bit
diff --git a/libraries/AP_InertialSensor/AP_InertialSensor_MPU6000.h b/libraries/AP_InertialSensor/AP_InertialSensor_MPU6000.h
index 407a12331b..79bb96b091 100644
--- a/libraries/AP_InertialSensor/AP_InertialSensor_MPU6000.h
+++ b/libraries/AP_InertialSensor/AP_InertialSensor_MPU6000.h
@@ -33,7 +33,7 @@ class AP_InertialSensor_MPU6000 : public AP_InertialSensor
   uint32_t sample_time();
   void reset_sample_time();
 
-  static void read();
+  static void read(uint32_t);
   static uint8_t register_read( uint8_t reg );
   static void register_write( uint8_t reg, uint8_t val );
   static void hardware_init();