diff --git a/src/drivers/device/sim.h b/src/drivers/device/sim.h
index 59f7446b47..139967f6e8 100644
--- a/src/drivers/device/sim.h
+++ b/src/drivers/device/sim.h
@@ -97,8 +97,8 @@ protected:
 	 * @return		OK if the transfer was successful, -errno
 	 *			otherwise.
 	 */
-	virtual int		transfer(const uint8_t *send, unsigned send_len,
-				 uint8_t *recv, unsigned recv_len);
+	virtual int	transfer(const uint8_t *send, unsigned send_len,
+					 uint8_t *recv, unsigned recv_len);
 
 private:
 	uint16_t		_address;
diff --git a/src/drivers/ms5611/ms5611_sim.cpp b/src/drivers/ms5611/ms5611_sim.cpp
index 782712bc4d..b99e35b676 100644
--- a/src/drivers/ms5611/ms5611_sim.cpp
+++ b/src/drivers/ms5611/ms5611_sim.cpp
@@ -65,6 +65,8 @@ public:
 	virtual int	dev_read(unsigned offset, void *data, unsigned count);
 	virtual int	dev_ioctl(unsigned operation, unsigned &arg);
 
+	virtual int	transfer(const uint8_t *send, unsigned send_len,
+				 uint8_t *recv, unsigned recv_len);
 private:
 	ms5611::prom_u	&_prom;
 
@@ -192,3 +194,12 @@ MS5611_SIM::_read_prom()
 	// TODO input simlation data
 	return ret;
 }
+
+int
+MS5611_SIM::transfer(const uint8_t *send, unsigned send_len,
+				 uint8_t *recv, unsigned recv_len)
+{
+	// TODO add Simulation data connection so calls retrieve
+	// data from the simulator
+	return 0;
+}