diff --git a/nrf5/hal/hal_twi.c b/nrf5/hal/hal_twi.c
index d71f29d5a8..fe729df6a1 100644
--- a/nrf5/hal/hal_twi.c
+++ b/nrf5/hal/hal_twi.c
@@ -38,6 +38,21 @@ static const uint32_t hal_twi_frequency_lookup[] = {
 void hal_twi_master_init(NRF_TWI_Type * p_instance, hal_twi_init_t const * p_twi_init) {
 }
 
+void hal_twi_master_tx(NRF_TWI_Type  * p_instance,
+                       uint8_t         addr,
+                       uint16_t        transfer_size,
+                       const uint8_t * tx_data,
+                       bool            stop) {
+
+}
+
+void hal_twi_master_rx(NRF_TWI_Type  * p_instance,
+                       uint8_t         addr,
+                       uint16_t        transfer_size,
+                       const uint8_t * rx_data) {
+
+}
+
 void hal_twi_slave_init(NRF_TWI_Type * p_instance, hal_twi_init_t const * p_twi_init) {
 }