diff --git a/cores/esp32/esp32-hal-spi.h b/cores/esp32/esp32-hal-spi.h
index 1317f38b..65d56b2e 100644
--- a/cores/esp32/esp32-hal-spi.h
+++ b/cores/esp32/esp32-hal-spi.h
@@ -54,7 +54,7 @@ extern "C" {
 struct spi_struct_t;
 typedef struct spi_struct_t spi_t;
 
-spi_t * spiStartBus(uint8_t spi_num, uint32_t freq, uint8_t dataMode, uint8_t bitOrder);
+spi_t * spiStartBus(uint8_t spi_num, uint32_t clockDiv, uint8_t dataMode, uint8_t bitOrder);
 void spiStopBus(spi_t * spi);
 
 //Attach/Detach Signal Pins