diff --git a/flight/pios/common/pios_hmc5x83.c b/flight/pios/common/pios_hmc5x83.c
index e11147275..0c34169c2 100644
--- a/flight/pios/common/pios_hmc5x83.c
+++ b/flight/pios/common/pios_hmc5x83.c
@@ -57,7 +57,7 @@ void PIOS_HMC5x83_driver_get_scale(float *scales, uint8_t size, uintptr_t contex
 void PIOS_HMC5x83_driver_fetch(void *, uint8_t size, uintptr_t context);
 bool PIOS_HMC5x83_driver_poll(uintptr_t context);
 
-PIOS_SENSORS_Driver PIOS_HMC5x83_Driver = {
+const PIOS_SENSORS_Driver PIOS_HMC5x83_Driver = {
     .test      = PIOS_HMC5x83_driver_Test,
     .poll      = PIOS_HMC5x83_driver_poll,
     .fetch     = PIOS_HMC5x83_driver_fetch,
diff --git a/flight/pios/common/pios_mpu6000.c b/flight/pios/common/pios_mpu6000.c
index ae0c6a6a4..289464a8a 100644
--- a/flight/pios/common/pios_mpu6000.c
+++ b/flight/pios/common/pios_mpu6000.c
@@ -48,7 +48,7 @@ void PIOS_MPU6000_driver_Reset(uintptr_t context);
 void PIOS_MPU6000_driver_get_scale(float *scales, uint8_t size, uintptr_t context);
 QueueHandle_t PIOS_MPU6000_driver_get_queue(uintptr_t context);
 
-PIOS_SENSORS_Driver PIOS_MPU6000_Driver = {
+const PIOS_SENSORS_Driver PIOS_MPU6000_Driver = {
     .test      = PIOS_MPU6000_driver_Test,
     .poll      = NULL,
     .fetch     = NULL,
diff --git a/flight/pios/inc/pios_hmc5x83.h b/flight/pios/inc/pios_hmc5x83.h
index 29c369cd7..3f81c4c9f 100644
--- a/flight/pios/inc/pios_hmc5x83.h
+++ b/flight/pios/inc/pios_hmc5x83.h
@@ -132,7 +132,7 @@ extern uint8_t PIOS_HMC5x83_ReadID(pios_hmc5x83_dev_t handler, uint8_t out[4]);
 extern int32_t PIOS_HMC5x83_Test(pios_hmc5x83_dev_t handler);
 extern bool PIOS_HMC5x83_IRQHandler(pios_hmc5x83_dev_t handler);
 
-extern PIOS_SENSORS_Driver PIOS_MPU6000_Driver;
+extern const PIOS_SENSORS_Driver PIOS_MPU6000_Driver;
 
 #endif /* PIOS_HMC5x83_H */
 
diff --git a/flight/pios/inc/pios_mpu6000.h b/flight/pios/inc/pios_mpu6000.h
index 4d6acbc61..fc9538052 100644
--- a/flight/pios/inc/pios_mpu6000.h
+++ b/flight/pios/inc/pios_mpu6000.h
@@ -160,7 +160,7 @@ extern int32_t PIOS_MPU6000_ReadID();
 extern void PIOS_MPU6000_Register();
 extern bool PIOS_MPU6000_IRQHandler(void);
 
-extern PIOS_SENSORS_Driver PIOS_MPU6000_Driver;
+extern const PIOS_SENSORS_Driver PIOS_MPU6000_Driver;
 #endif /* PIOS_MPU6000_H */
 
 /**