diff --git a/libraries/AP_HAL_Empty/SPIDriver.cpp b/libraries/AP_HAL_Empty/SPIDriver.cpp
index 8b0e903ab2..cd60a8f116 100644
--- a/libraries/AP_HAL_Empty/SPIDriver.cpp
+++ b/libraries/AP_HAL_Empty/SPIDriver.cpp
@@ -41,7 +41,7 @@ EmptySPIDeviceManager::EmptySPIDeviceManager()
 void EmptySPIDeviceManager::init(void *)
 {}
 
-AP_HAL::SPIDeviceDriver* EmptySPIDeviceManager::device(enum AP_HAL::SPIDevice)
+AP_HAL::SPIDeviceDriver* EmptySPIDeviceManager::device(enum AP_HAL::SPIDevice, uint8_t index)
 {
     return &_device;
 }
diff --git a/libraries/AP_HAL_Empty/SPIDriver.h b/libraries/AP_HAL_Empty/SPIDriver.h
index b160b852cb..f0b584aeaf 100644
--- a/libraries/AP_HAL_Empty/SPIDriver.h
+++ b/libraries/AP_HAL_Empty/SPIDriver.h
@@ -24,7 +24,7 @@ class Empty::EmptySPIDeviceManager : public AP_HAL::SPIDeviceManager {
 public:
     EmptySPIDeviceManager();
     void init(void *);
-    AP_HAL::SPIDeviceDriver* device(enum AP_HAL::SPIDevice);
+    AP_HAL::SPIDeviceDriver* device(enum AP_HAL::SPIDevice, uint8_t index);
 private:
     EmptySPIDeviceDriver _device;
 };