diff --git a/libraries/AP_HAL/I2CDriver.h b/libraries/AP_HAL/I2CDriver.h
index 9f21b87178..d98249b966 100644
--- a/libraries/AP_HAL/I2CDriver.h
+++ b/libraries/AP_HAL/I2CDriver.h
@@ -40,6 +40,9 @@ public:
                                           uint8_t* data) = 0;
 #endif
 
+    virtual bool do_transfer(uint8_t address, const uint8_t *send,
+                             uint32_t send_len, uint8_t *recv,
+                             uint32_t recv_len) { return false;};
     virtual uint8_t lockup_count() = 0;
     void ignore_errors(bool b) { _ignore_errors = b; }
     virtual AP_HAL::Semaphore* get_semaphore() = 0;